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

In Shirley, the summers are warm and humid; the winters are very cold, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 25°F to 82°F and is rarely below 11°F or above 89°F.

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

Climate in Shirley

very coldcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow64%64%48%48%clearovercastprecipitation: 4.1 inprecipitation: 4.1 in2.6 in2.6 inmuggy: 58%muggy: 58%0%0%drydrytourism score: 7.0tourism score: 7.00.10.1
Shirley weather by month. Click on each chart for more information.

The warm season lasts for 3.4 months, from June 5 to September 17, with an average daily high temperature above 73°F. The hottest month of the year in Shirley is July, with an average high of 81°F and low of 67°F.

The cold season lasts for 3.3 months, from December 5 to March 15, with an average daily high temperature below 47°F. The coldest month of the year in Shirley is January, with an average low of 26°F and high of 40°F.

Average High and Low Temperature in Shirley

Average High and Low Temperature in ShirleywarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 3039°FJan 3039°FJul 2082°FJul 2082°F25°F25°F68°F68°FJun 573°FJun 573°FSep 1773°FSep 1773°FDec 547°FDec 547°FMar 1547°FMar 1547°F58°F58°F59°F59°F34°F34°F33°F33°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 40°F41°F48°F57°F67°F76°F81°F80°F73°F63°F54°F45°F
Temp. 32°F34°F40°F49°F59°F68°F74°F73°F66°F56°F47°F38°F
Low 26°F27°F33°F42°F51°F61°F67°F66°F58°F48°F39°F31°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 Shirley

Average Hourly Temperature in ShirleyJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldvery coldcoldcoldcoolcoolcomfortablewarmfreezing
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.

Constanţa, Romania (4,820 miles away); Ullubiyaul, Russia (5,593 miles); and Sendai, Japan (6,581 miles) are the far-away foreign places with temperatures most similar to Shirley (view comparison).

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

The clearer part of the year in Shirley begins around June 26 and lasts for 4.5 months, ending around November 11.

The clearest month of the year in Shirley is September, during which on average the sky is clear, mostly clear, or partly cloudy 63% of the time.

The cloudier part of the year begins around November 11 and lasts for 7.5 months, ending around June 26.

The cloudiest month of the year in Shirley is February, during which on average the sky is overcast or mostly cloudy 51% of the time.

Cloud Cover Categories in Shirley

Cloud Cover Categories in ShirleyclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 2264%Sep 2264%Jan 348%Jan 348%Jun 2656%Jun 2656%Nov 1156%Nov 1156%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 51%51%50%50%50%47%41%38%37%38%45%50%
Clearer 49%49%50%50%50%53%59%62%63%62%55%50%

Shirley does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 23% to 31%, with an average value of 27%.

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 Shirley is May, with an average of 8.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 31% on August 2.

Daily Chance of Precipitation in Shirley

Daily Chance of Precipitation in ShirleyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 231%Aug 231%Oct 2023%Oct 2023%NowNowrainmixedsnow
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 5.2d5.1d7.2d8.3d8.9d8.5d8.8d8.6d7.7d7.7d7.6d7.4d
Mixed 1.7d1.5d1.1d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.2d1.1d
Snow 1.0d0.8d0.3d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.4d
Any 7.9d7.4d8.6d8.5d8.9d8.5d8.8d8.6d7.7d7.7d7.9d8.9d

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. Shirley experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Shirley. The month with the most rain in Shirley is April, with an average rainfall of 3.8 inches.

The month with the least rain in Shirley is January, with an average rainfall of 2.6 inches.

Average Monthly Rainfall in Shirley

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 2.6″2.7″3.5″3.8″3.4″3.3″2.8″3.3″3.3″3.6″3.6″3.5″

Snowfall

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

The snowy period of the year lasts for 4.3 months, from November 25 to April 2, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Shirley is January, with an average snowfall of 5.3 inches.

The snowless period of the year lasts for 7.7 months, from April 2 to November 25. The least snow falls around July 28, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Shirley

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 5.3″5.0″2.8″0.3″0.0″0.0″0.0″0.0″0.0″0.0″0.5″2.9″

The length of the day in Shirley varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 15 minutes of daylight; the longest day is June 20, with 15 hours, 6 minutes of daylight.

Hours of Daylight and Twilight in Shirley

Hours of Daylight and Twilight in ShirleyJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1915 hr, 6 minJun 2015 hr, 6 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 229 hr, 15 minDec 219 hr, 15 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 9.6h10.7h12.0h13.3h14.5h15.1h14.7h13.7h12.4h11.1h9.9h9.3h

The earliest sunrise is at 5:19 AM on June 14, and the latest sunrise is 2 hours, 4 minutes later at 7:23 AM on November 2. The earliest sunset is at 4:23 PM on December 6, and the latest sunset is 4 hours, 3 minutes later at 8:27 PM on June 26.

Daylight saving time (DST) is observed in Shirley during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

Sunrise & Sunset with Twilight and Daylight Saving Time in Shirley

Sunrise & Sunset with Twilight and Daylight Saving Time in ShirleyJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:19 AMJun 145:19 AM8:27 PMJun 268:27 PMJun 26Dec 64:23 PMDec 64:23 PM7:23 AMNov 27:23 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2024. 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 Shirley

Solar Elevation and Azimuth in ShirleyJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000101010102020203030304040505060607000010101020202020303040405050602673NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. 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 2024. 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 Shirley

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.

Shirley experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.6 months, from June 8 to September 26, during which time the comfort level is muggy, oppressive, or miserable at least 14% of the time. The month with the most muggy days in Shirley is July, with 16.0 days that are muggy or worse.

The least muggy day of the year is February 26, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Shirley

Humidity Comfort Levels in ShirleymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 260%Feb 260%Aug 158%Aug 158%Jun 814%Jun 814%Sep 2614%Sep 2614%NowNowoppressiveoppressivemuggymuggydrydryhumidhumidcomfortablecomfortablemiserablemiserable
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 0.0d0.0d0.0d0.0d0.8d6.9d16.0d14.6d7.1d1.4d0.0d0.0d

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 Shirley experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.1 months, from October 7 to April 12, with average wind speeds of more than 11.7 miles per hour. The windiest month of the year in Shirley is January, with an average hourly wind speed of 14.6 miles per hour.

The calmer time of year lasts for 5.9 months, from April 12 to October 7. The calmest month of the year in Shirley is July, with an average hourly wind speed of 8.9 miles per hour.

Average Wind Speed in Shirley

Average Wind Speed in ShirleywindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mph22 mph22 mphJan 1314.7 mphJan 1314.7 mphJul 258.7 mphJul 258.7 mphOct 711.7 mphOct 711.7 mphApr 1211.7 mphApr 1211.7 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) 14.614.013.011.510.09.28.99.010.312.213.714.3

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

The wind is most often from the north for 1.0 weeks, from March 13 to March 20, with a peak percentage of 32% on March 13. The wind is most often from the west for 1.3 months, from March 20 to April 28 and for 5.5 months, from September 28 to March 13, with a peak percentage of 31% on March 23. The wind is most often from the south for 5.0 months, from April 28 to September 28, with a peak percentage of 41% on July 27.

Wind Direction in Shirley

Wind Direction in ShirleyWWSWJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Shirley 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 3.4 months, from June 24 to October 5, with an average temperature above 65°F. The month of the year in Shirley with the warmest water is August, with an average temperature of 72°F.

The time of year with cooler water lasts for 3.6 months, from December 30 to April 18, with an average temperature below 45°F. The month of the year in Shirley with the coolest water is February, with an average temperature of 39°F.

Average Water Temperature in Shirley

Average Water Temperature in ShirleywarmcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°FAug 972°FAug 972°F39°FFeb 2639°FFeb 26Jun 2465°FJun 2465°FOct 565°FOct 565°FDec 3045°FDec 3045°FApr 1845°FApr 1845°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 42°F39°F40°F45°F53°F63°F70°F72°F69°F63°F55°F48°F

To characterize how pleasant the weather is in Shirley 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 Shirley for general outdoor tourist activities is from early June to late September, with a peak score in the last week of August.

Tourism Score in Shirley

Tourism Score in Shirleybest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.07.00.10.16.86.8NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism 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 Shirley for hot-weather activities is from early July to late August, with a peak score in the third week of July.

Beach/Pool Score in Shirley

Beach/Pool Score in Shirleybest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.36.30.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/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 Shirley typically lasts for 6.7 months (205 days), from around April 9 to around October 31, rarely starting before March 23 or after April 26, and rarely ending before October 12 or after November 18.

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

Time Spent in Various Temperature Bands and the Growing Season in Shirleygrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 950%Apr 950%Oct 3150%Oct 3190%Apr 2690%Apr 2690%Oct 1290%Oct 1210%Mar 2310%Mar 2310%Nov 1810%Nov 180%Dec 200%Dec 20Jul 20100%Jul 20100%freezingvery coldcoldcoolcomfortablewarmfrigidhot
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 Shirley should appear around April 23, only rarely appearing before April 10 or after May 2.

Growing Degree Days in Shirley

Growing Degree Days in ShirleyJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FApr 2387°FApr 2387°FJun 28900°FJun 28900°FAug 51,800°FAug 51,800°FDec 313,175°FDec 313,175°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 3.7 months, from April 28 to August 19, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Shirley is June, with an average of 6.8 kWh.

The darker period of the year lasts for 3.2 months, from November 4 to February 11, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest month of the year in Shirley is December, with an average of 1.8 kWh.

Average Daily Incident Shortwave Solar Energy in Shirley

Average Daily Incident Shortwave Solar Energy in ShirleybrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 297.0 kWhJun 297.0 kWhDec 231.8 kWhDec 231.8 kWhApr 285.9 kWhApr 285.9 kWhAug 195.9 kWhAug 195.9 kWhNov 42.8 kWhNov 42.8 kWhFeb 112.8 kWhFeb 112.8 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) 2.12.94.15.46.36.86.76.05.03.62.41.8

For the purposes of this report, the geographical coordinates of Shirley are 40.801 deg latitude, -72.868 deg longitude, and 52 ft elevation.

The topography within 2 miles of Shirley is essentially flat, with a maximum elevation change of 82 feet and an average elevation above sea level of 35 feet. Within 10 miles is essentially flat (315 feet). Within 50 miles contains only modest variations in elevation (968 feet).

The area within 2 miles of Shirley is covered by artificial surfaces (73%) and trees (26%), within 10 miles by artificial surfaces (40%) and water (36%), and within 50 miles by water (68%) and trees (16%).

This report illustrates the typical weather in Shirley, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Shirley.

For each station, the records are corrected for the elevation difference between that station and Shirley 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 Shirley is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Shirley 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 Shirley 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 © OpenStreetMap contributors.

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.