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Climate and Average Weather Year Round in Jamestown New York, United States

In Jamestown, the summers are comfortable and partly cloudy and the winters are freezing, snowy, and mostly cloudy. Over the course of the year, the temperature typically varies from 17°F to 78°F and is rarely below 1°F or above 86°F.

Based on the tourism score, the best time of year to visit Jamestown for warm-weather activities is from late June to early September.

Climate in Jamestown

freezingvery coldcoldcoolwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow65%65%23%23%clearovercastprecipitation: 3.3 inprecipitation: 3.3 in1.4 in1.4 inmuggy: 19%muggy: 19%0%0%drydrytourism score: 6.7tourism score: 6.70.00.0
Jamestown weather by month. Click on each chart for more information.

The warm season lasts for 3.8 months, from May 24 to September 18, with an average daily high temperature above 69°F. The hottest month of the year in Jamestown is July, with an average high of 78°F and low of 61°F.

The cold season lasts for 3.2 months, from December 2 to March 10, with an average daily high temperature below 40°F. The coldest month of the year in Jamestown is January, with an average low of 18°F and high of 31°F.

Average High and Low Temperature in Jamestown

Average High and Low Temperature in JamestownwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2930°FJan 2930°FJul 2078°FJul 2078°F17°F17°F61°F61°FMay 2469°FMay 2469°FSep 1869°FSep 1869°FDec 240°FDec 240°FMar 1040°FMar 1040°F50°F50°F52°F52°F29°F29°F24°F24°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 31°F33°F43°F56°F67°F74°F78°F76°F69°F58°F46°F36°F
Temp. 24°F25°F34°F46°F57°F65°F69°F67°F60°F50°F40°F29°F
Low 18°F19°F27°F38°F48°F57°F61°F59°F52°F43°F33°F24°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in Jamestown

Average Hourly Temperature in JamestownJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowfreezingvery coldcoldcoldcoolcomfortablewarmvery coldfreezingcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Nizhniy Kurkuzhin, Russia (5,529 miles away) is the far-away foreign place with temperatures most similar to Jamestown (view comparison).

Map
Marker
© Esri, et al.

Compare Jamestown to another city:

Map

In Jamestown, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Jamestown begins around April 18 and lasts for 6.7 months, ending around November 9.

The clearest month of the year in Jamestown is August, during which on average the sky is clear, mostly clear, or partly cloudy 64% of the time.

The cloudier part of the year begins around November 9 and lasts for 5.3 months, ending around April 18.

The cloudiest month of the year in Jamestown is January, during which on average the sky is overcast or mostly cloudy 76% of the time.

Cloud Cover Categories in Jamestown

Cloud Cover Categories in JamestownclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 965%Aug 965%Jan 1123%Jan 1123%Apr 1844%Apr 1844%Nov 944%Nov 944%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 76%72%62%56%53%47%39%36%39%48%60%72%
Clearer 24%28%38%44%47%53%61%64%61%52%40%28%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Jamestown varies throughout the year.

The wetter season lasts 9.0 months, from March 19 to December 18, with a greater than 28% chance of a given day being a wet day. The month with the most wet days in Jamestown is June, with an average of 11.2 days with at least 0.04 inches of precipitation.

The drier season lasts 3.0 months, from December 18 to March 19. The month with the fewest wet days in Jamestown is February, with an average of 5.7 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Jamestown is June, with an average of 11.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 39% on June 15.

Daily Chance of Precipitation in Jamestown

Daily Chance of Precipitation in JamestownwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1539%Jun 1539%Jan 3017%Jan 3017%Jan 126%Jan 126%Mar 1928%Mar 1928%NowNowrainsnowmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 2.9d2.7d5.6d8.9d10.5d11.2d11.4d10.9d10.1d10.1d7.1d4.6d
Mixed 2.5d1.7d1.3d0.1d0.0d0.0d0.0d0.0d0.0d0.1d1.0d2.4d
Snow 1.1d1.2d1.6d0.6d0.0d0.0d0.0d0.0d0.0d0.2d1.3d1.9d
Any 6.5d5.7d8.5d9.7d10.6d11.2d11.4d10.9d10.1d10.4d9.3d8.8d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Jamestown experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Jamestown. The month with the most rain in Jamestown is June, with an average rainfall of 3.3 inches.

The month with the least rain in Jamestown is February, with an average rainfall of 1.0 inches.

Average Monthly Rainfall in Jamestown

Average Monthly Rainfall in JamestownJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inJul 273.3 inJul 273.3 inFeb 70.9 inFeb 70.9 inJun 63.3 inJun 63.3 inSep 233.3 inSep 233.3 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 1.1″1.0″1.5″2.4″2.9″3.3″3.2″3.0″3.2″3.0″2.3″1.6″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Jamestown experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 5.4 months, from November 1 to April 14, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Jamestown is December, with an average snowfall of 5.4 inches.

The snowless period of the year lasts for 6.6 months, from April 14 to November 1. The least snow falls around July 27, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Jamestown

Average Monthly Snowfall in JamestownsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inDec 235.6 inDec 235.6 inJul 270.0 inJul 270.0 inMar 15.4 inMar 15.4 inNov 11.0 inNov 11.0 inApr 141.0 inApr 141.0 inNowNow
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 5.1″5.1″4.5″1.0″0.0″0.0″0.0″0.0″0.0″0.2″2.5″5.4″

The length of the day in Jamestown varies significantly over the course of the year. In 2022, the shortest day is December 21, with 9 hours, 6 minutes of daylight; the longest day is June 21, with 15 hours, 15 minutes of daylight.

Hours of Daylight and Twilight in Jamestown

Hours of Daylight and Twilight in JamestownJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2015 hr, 15 minJun 2115 hr, 15 minJun 2112 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 6 minDec 219 hr, 6 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 9.5h10.6h12.0h13.4h14.6h15.2h14.9h13.8h12.4h11.0h9.8h9.2h

The earliest sunrise is at 5:40 AM on June 14, and the latest sunrise is 2 hours, 14 minutes later at 7:54 AM on November 5. The earliest sunset is at 4:45 PM on December 8, and the latest sunset is 4 hours, 12 minutes later at 8:57 PM on June 27.

Daylight saving time (DST) is observed in Jamestown during 2022, starting in the spring on March 13, lasting 7.8 months, and ending in the fall on November 6.

Sunrise & Sunset with Twilight and Daylight Saving Time in Jamestown

Sunrise & Sunset with Twilight and Daylight Saving Time in JamestownJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:40 AMJun 145:40 AM8:57 PMJun 278:57 PMJun 27Dec 84:45 PMDec 84:45 PM7:54 AMNov 57:54 AMNov 5Mar 13DSTMar 13DSTDSTNov 6DSTNov 6daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2022. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Jamestown

Solar Elevation and Azimuth in JamestownJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM0001010101020202030303040405050606000010101020202020303040405050602471NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2022. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2022. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Jamestown

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Jamestown experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.5 months, from June 3 to September 17, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The month with the most muggy days in Jamestown is July, with 5.5 days that are muggy or worse.

The least muggy day of the year is February 21, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Jamestown

Humidity Comfort Levels in JamestownmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 210%Feb 210%Aug 119%Aug 119%Jun 35%Jun 35%Sep 175%Sep 175%muggymuggyhumidhumidcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.4d2.6d5.5d4.4d1.5d0.1d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Jamestown experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.0 months, from November 12 to April 10, with average wind speeds of more than 6.8 miles per hour. The windiest month of the year in Jamestown is January, with an average hourly wind speed of 9.2 miles per hour.

The calmer time of year lasts for 7.0 months, from April 10 to November 12. The calmest month of the year in Jamestown is August, with an average hourly wind speed of 4.3 miles per hour.

Average Wind Speed in Jamestown

Average Wind Speed in JamestownwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphJan 179.4 mphJan 179.4 mphAug 44.2 mphAug 44.2 mphNov 126.8 mphNov 126.8 mphApr 106.8 mphApr 106.8 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 9.28.97.86.55.24.64.34.34.95.97.08.2

The predominant average hourly wind direction in Jamestown varies throughout the year.

The wind is most often from the south for 1.4 months, from September 10 to October 21, with a peak percentage of 37% on October 3. The wind is most often from the west for 11 months, from October 21 to September 10, with a peak percentage of 47% on January 1.

Wind Direction in Jamestown

Wind Direction in JamestownWSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Jamestown is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.0 months, from June 26 to September 28, with an average temperature above 65°F. The month of the year in Jamestown with the warmest water is August, with an average temperature of 73°F.

The time of year with cooler water lasts for 4.3 months, from December 23 to May 1, with an average temperature below 42°F. The month of the year in Jamestown with the coolest water is February, with an average temperature of 34°F.

Average Water Temperature in Jamestown

Average Water Temperature in JamestownwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°FAug 773°FAug 773°F34°FFeb 2734°FFeb 27Jun 2665°FJun 2665°FSep 2865°FSep 2865°FDec 2342°FDec 2342°FMay 142°FMay 142°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 37°F34°F34°F38°F48°F62°F71°F73°F68°F59°F51°F43°F

To characterize how pleasant the weather is in Jamestown throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Jamestown for general outdoor tourist activities is from late June to early September, with a peak score in the second week of August.

Tourism Score in Jamestown

Tourism Score in Jamestownbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.76.70.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Jamestown for hot-weather activities is from early July to mid August, with a peak score in the third week of July.

Beach/Pool Score in Jamestown

Beach/Pool Score in JamestownJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.34.30.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Jamestown typically lasts for 5.6 months (170 days), from around April 30 to around October 17, rarely starting before April 12 or after May 21, and rarely ending before September 30 or after November 5.

Time Spent in Various Temperature Bands and the Growing Season in Jamestown

Time Spent in Various Temperature Bands and the Growing Season in Jamestowngrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 3050%Apr 3050%Oct 1750%Oct 1750%May 2190%May 2190%Sep 3090%Sep 3090%Apr 1210%Apr 1210%Nov 510%Nov 510%Jul 29100%Jul 29100%NowNowfrigidfreezingvery coldcoldcoolcomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Jamestown should appear around April 20, only rarely appearing before April 5 or after May 4.

Growing Degree Days in Jamestown

Growing Degree Days in JamestownJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°FApr 2090°FApr 2090°FJul 2900°FJul 2900°FAug 201,800°FAug 201,800°FDec 312,479°FDec 312,479°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.6 months, from May 5 to August 23, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Jamestown is June, with an average of 6.7 kWh.

The darker period of the year lasts for 3.5 months, from November 2 to February 15, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest month of the year in Jamestown is December, with an average of 1.4 kWh.

Average Daily Incident Shortwave Solar Energy in Jamestown

Average Daily Incident Shortwave Solar Energy in JamestownbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 306.9 kWhJun 306.9 kWhDec 231.3 kWhDec 231.3 kWhMay 55.8 kWhMay 55.8 kWhAug 235.8 kWhAug 235.8 kWhFeb 152.4 kWhFeb 152.4 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 1.62.43.85.16.16.76.75.94.73.21.91.4

For the purposes of this report, the geographical coordinates of Jamestown are 42.097 deg latitude, -79.235 deg longitude, and 1,365 ft elevation.

The topography within 2 miles of Jamestown contains only modest variations in elevation, with a maximum elevation change of 371 feet and an average elevation above sea level of 1,422 feet. Within 10 miles contains only modest variations in elevation (965 feet). Within 50 miles also contains very significant variations in elevation (1,877 feet).

The area within 2 miles of Jamestown is covered by artificial surfaces (64%), trees (22%), and cropland (10%), within 10 miles by trees (64%) and cropland (25%), and within 50 miles by trees (64%) and water (19%).

This report illustrates the typical weather in Jamestown, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Jamestown.

For each station, the records are corrected for the elevation difference between that station and Jamestown according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Jamestown is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jamestown and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Jamestown and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.