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Climate and Average Weather Year Round in Wrangell Alaska, United States

In Wrangell, the summers are cool, the winters are long and very cold, and it is wet and overcast year round. Over the course of the year, the temperature typically varies from 29°F to 65°F and is rarely below 14°F or above 73°F.

Based on the tourism score, the best time of year to visit Wrangell for warm-weather activities is from mid July to mid August.

Climate in Wrangell

very coldcoldcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow35%35%19%19%overcastclearprecipitation: 15.1 inprecipitation: 15.1 in4.5 in4.5 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 3.4tourism score: 3.40.00.0
Wrangell weather by month. Click on each chart for more information.

The warm season lasts for 3.4 months, from May 25 to September 7, with an average daily high temperature above 59°F. The hottest month of the year in Wrangell is July, with an average high of 64°F and low of 52°F.

The cold season lasts for 4.0 months, from November 11 to March 12, with an average daily high temperature below 42°F. The coldest month of the year in Wrangell is January, with an average low of 30°F and high of 37°F.

Average High and Low Temperature in Wrangell

Average High and Low Temperature in WrangellwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FDec 3136°FDec 3136°FJul 3165°FJul 3165°F29°F29°F53°F53°FMay 2559°FMay 2559°FSep 759°FSep 759°FNov 1142°FNov 1142°FMar 1242°FMar 1242°F46°F46°F49°F49°F35°F35°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 37°F39°F43°F50°F57°F62°F64°F63°F57°F49°F41°F37°F
Temp. 33°F35°F38°F43°F49°F55°F57°F57°F52°F45°F38°F34°F
Low 30°F31°F34°F38°F44°F49°F52°F52°F48°F42°F34°F30°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 Wrangell

Average Hourly Temperature in WrangellJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowvery coldvery coldcoldcoolcool
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.

Knarvik, Norway (4,034 miles away) is the far-away foreign place with temperatures most similar to Wrangell (view comparison).

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In Wrangell, 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 Wrangell begins around April 10 and lasts for 5.1 months, ending around September 13.

The clearest month of the year in Wrangell is August, during which on average the sky is clear, mostly clear, or partly cloudy 33% of the time.

The cloudier part of the year begins around September 13 and lasts for 6.9 months, ending around April 10.

The cloudiest month of the year in Wrangell is October, during which on average the sky is overcast or mostly cloudy 81% of the time.

Cloud Cover Categories in Wrangell

Cloud Cover Categories in WrangellclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 1035%Aug 1035%Oct 2119%Oct 2119%Apr 1027%Apr 1027%Sep 1327%Sep 1327%NowNowclearpartly cloudymostly cloudyovercastmostly clear
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 78%74%74%72%67%70%69%67%74%81%79%78%
Clearer 22%26%26%28%33%30%31%33%26%19%21%22%

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

The wetter season lasts 5.5 months, from August 24 to February 8, with a greater than 59% chance of a given day being a wet day. The month with the most wet days in Wrangell is October, with an average of 22.7 days with at least 0.04 inches of precipitation.

The drier season lasts 6.5 months, from February 8 to August 24. The month with the fewest wet days in Wrangell is May, with an average of 13.6 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 Wrangell is October, with an average of 22.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 75% on October 21.

Daily Chance of Precipitation in Wrangell

Daily Chance of Precipitation in WrangellwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Oct 2175%Oct 2175%May 2742%May 2742%Aug 2459%Aug 2459%Feb 859%Feb 859%NowNowmixedrainsnow
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 14.4d13.1d15.6d15.2d13.6d13.8d14.8d17.0d19.3d22.5d18.9d15.7d
Mixed 3.7d2.5d1.3d0.1d0.0d0.0d0.0d0.0d0.0d0.2d1.7d3.3d
Snow 1.8d1.0d0.3d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.5d1.5d
Any 19.9d16.6d17.3d15.3d13.6d13.8d14.8d17.0d19.3d22.7d21.2d20.4d

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. Wrangell experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Wrangell. The month with the most rain in Wrangell is October, with an average rainfall of 15.0 inches.

The month with the least rain in Wrangell is June, with an average rainfall of 4.7 inches.

Average Monthly Rainfall in Wrangell

Average Monthly Rainfall in WrangellJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 inOct 1615.0 inOct 1615.0 inJun 54.5 inJun 54.5 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 10.3″8.6″7.8″6.7″4.9″4.7″5.6″8.2″12.7″15.0″12.5″11.0″

Snowfall

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

The snowy period of the year lasts for 4.9 months, from October 30 to March 25, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Wrangell is January, with an average snowfall of 11.2 inches.

The snowless period of the year lasts for 7.1 months, from March 25 to October 30. The least snow falls around July 15, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Wrangell

Average Monthly Snowfall in WrangellsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 in30 in30 inJan 1311.4 inJan 1311.4 inJul 150.0 inJul 150.0 inOct 301.0 inOct 301.0 inMar 251.0 inMar 251.0 in
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 11.2″6.5″2.1″0.0″0.0″0.0″0.0″0.0″0.0″0.2″3.3″8.5″

The length of the day in Wrangell varies extremely over the course of the year. In 2024, the shortest day is December 21, with 6 hours, 50 minutes of daylight; the longest day is June 20, with 17 hours, 45 minutes of daylight.

Hours of Daylight and Twilight in Wrangell

Hours of Daylight and Twilight in WrangellJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 11 minMar 1912 hr, 11 minMar 1917 hr, 45 minJun 2017 hr, 45 minJun 2012 hr, 15 minSep 2212 hr, 15 minSep 226 hr, 50 minDec 216 hr, 50 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 7.6h9.6h11.9h14.3h16.5h17.6h17.0h15.0h12.7h10.3h8.1h7.0h

The earliest sunrise is at 3:58 AM on June 17, and the latest sunrise is 4 hours, 26 minutes later at 8:24 AM on December 28. The earliest sunset is at 3:11 PM on December 14, and the latest sunset is 6 hours, 33 minutes later at 9:43 PM on June 23.

Daylight saving time (DST) is observed in Wrangell 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 Wrangell

Sunrise & Sunset with Twilight and Daylight Saving Time in WrangellJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 173:58 AMJun 173:58 AM9:43 PMJun 239:43 PMJun 23Dec 143:11 PMDec 143:11 PM8:24 AMDec 288:24 AMDec 28Mar 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 Wrangell

Solar Elevation and Azimuth in WrangellJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000101010102020303040405000010101020202030304040501057NowNow
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 Wrangell

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.

The perceived humidity level in Wrangell, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels in Wrangell

Humidity Comfort Levels in WrangellJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 160%Jan 160%Jul 20%Jul 20%NowNowdrydrycomfortablecomfortable
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 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

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

The windier part of the year lasts for 6.1 months, from October 4 to April 9, with average wind speeds of more than 6.4 miles per hour. The windiest month of the year in Wrangell is January, with an average hourly wind speed of 8.3 miles per hour.

The calmer time of year lasts for 5.9 months, from April 9 to October 4. The calmest month of the year in Wrangell is July, with an average hourly wind speed of 4.4 miles per hour.

Average Wind Speed in Wrangell

Average Wind Speed in WrangellwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphJan 28.5 mphJan 28.5 mphJul 174.4 mphJul 174.4 mphOct 46.4 mphOct 46.4 mphApr 96.4 mphApr 96.4 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) 8.37.87.26.25.04.64.44.75.66.97.98.3

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

The wind is most often from the south for 3.0 days, from June 15 to June 18 and for 1.6 months, from August 5 to September 23, with a peak percentage of 37% on September 16. The wind is most often from the west for 1.6 months, from June 18 to August 5, with a peak percentage of 39% on July 18. The wind is most often from the east for 8.7 months, from September 23 to June 15, with a peak percentage of 66% on January 1.

Wind Direction in Wrangell

Wind Direction in WrangellEWSEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
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).

Wrangell 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 some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.4 months, from July 4 to September 17, with an average temperature above 51°F. The month of the year in Wrangell with the warmest water is August, with an average temperature of 53°F.

The time of year with cooler water lasts for 4.4 months, from December 18 to April 30, with an average temperature below 44°F. The month of the year in Wrangell with the coolest water is March, with an average temperature of 41°F.

Average Water Temperature in Wrangell

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 42°F42°F41°F42°F45°F49°F52°F53°F51°F48°F45°F44°F

To characterize how pleasant the weather is in Wrangell 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 Wrangell for general outdoor tourist activities is from mid July to mid August, with a peak score in the last week of July.

Tourism Score in Wrangell

Tourism Score in WrangellJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.43.40.00.0NowNowtemperaturetemperature 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 Wrangell for hot-weather activities is from late July to early August.

Beach/Pool Score in Wrangell

Beach/Pool Score in WrangellJanFebMarAprMayJunJulAugSepOctNovDec002244668810100.10.10.00.0temperaturetemperature cloudscloudsprecipitationprecipitation
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 Wrangell typically lasts for 6.9 months (209 days), from around April 8 to around November 3, rarely starting before March 15 or after April 27, and rarely ending before October 9 or after November 28.

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

Time Spent in Various Temperature Bands and the Growing Season in Wrangellgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 850%Apr 850%Nov 350%Nov 390%Apr 2790%Apr 2790%Oct 990%Oct 910%Mar 1510%Mar 1510%Nov 2810%Nov 280%Jan 240%Jan 24Jul 15100%Jul 15100%NowNowfreezingvery coldcoldcoolfrigid
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 Wrangell should appear around June 2, only rarely appearing before May 20 or after June 18.

Growing Degree Days in Wrangell

Growing Degree Days in WrangellJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F100°F100°F200°F200°F300°F300°F400°F400°F500°F500°F600°F600°F700°F700°F800°F800°F900°F900°FJun 290°FJun 290°FDec 31764°FDec 31764°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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from April 25 to August 6, with an average daily incident shortwave energy per square meter above 4.2 kWh. The brightest month of the year in Wrangell is June, with an average of 5.0 kWh.

The darker period of the year lasts for 4.2 months, from October 11 to February 18, with an average daily incident shortwave energy per square meter below 1.3 kWh. The darkest month of the year in Wrangell is December, with an average of 0.3 kWh.

Average Daily Incident Shortwave Solar Energy in Wrangell

Average Daily Incident Shortwave Solar Energy in WrangellbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMay 265.1 kWhMay 265.1 kWhDec 190.3 kWhDec 190.3 kWhAug 64.2 kWhAug 64.2 kWhOct 111.3 kWhOct 111.3 kWhFeb 181.3 kWhFeb 181.3 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) 0.51.22.33.74.95.04.63.72.31.20.60.3

For the purposes of this report, the geographical coordinates of Wrangell are 56.471 deg latitude, -132.377 deg longitude, and 69 ft elevation.

The topography within 2 miles of Wrangell contains large variations in elevation, with a maximum elevation change of 2,182 feet and an average elevation above sea level of 193 feet. Within 10 miles contains large variations in elevation (3,688 feet). Within 50 miles also contains extreme variations in elevation (9,980 feet).

The area within 2 miles of Wrangell is covered by water (64%) and trees (25%), within 10 miles by water (49%) and trees (41%), and within 50 miles by trees (44%) and water (22%).

This report illustrates the typical weather in Wrangell, 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 Wrangell.

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