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Climate and Average Weather Year Round at Wrangell Airport Alaska, United States

At Wrangell Airport, 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 Airport for warm-weather activities is from mid July to mid August.

Climate at Wrangell Airport

very coldcoldcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow35%35%18%18%overcastclearprecipitation: 15.2 inprecipitation: 15.2 in4.6 in4.6 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 3.4tourism score: 3.40.00.0
Wrangell Airport weather by month. Click on each chart for more information.

The warm season lasts for 3.4 months, from May 26 to September 7, with an average daily high temperature above 59°F. The hottest month of the year at Wrangell Airport is July, with an average high of 64°F and low of 52°F.

The cold season lasts for 4.0 months, from November 10 to March 12, with an average daily high temperature below 42°F. The coldest month of the year at Wrangell Airport is January, with an average low of 30°F and high of 37°F.

Average High and Low Temperature at Wrangell Airport

Average High and Low Temperature at Wrangell AirportwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°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 2659°FMay 2659°FSep 759°FSep 759°FNov 1042°FNov 1042°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°F54°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 at Wrangell Airport

Average Hourly Temperature at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec12 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 (4,033 miles away) is the far-away foreign place with temperatures most similar to Wrangell Airport (view comparison).

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At Wrangell Airport, 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 at Wrangell Airport begins around April 10 and lasts for 5.1 months, ending around September 13.

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

Cloud Cover Categories at Wrangell Airport

Cloud Cover Categories at Wrangell AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%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 2118%Oct 2118%Apr 1026%Apr 1026%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%75%74%72%67%70%69%67%74%81%79%78%
Clearer 22%25%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 at Wrangell Airport varies significantly throughout the year.

The wetter season lasts 5.5 months, from August 23 to February 7, with a greater than 59% chance of a given day being a wet day. The month with the most wet days at Wrangell Airport 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 7 to August 23. The month with the fewest wet days at Wrangell Airport is May, with an average of 13.7 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 at Wrangell Airport is October, with an average of 22.4 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 74% on October 21.

Daily Chance of Precipitation at Wrangell Airport

Daily Chance of Precipitation at Wrangell AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Oct 2275%Oct 2275%May 2742%May 2742%Aug 2359%Aug 2359%Feb 759%Feb 759%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 14.4d13.0d15.6d15.2d13.7d13.8d14.9d17.0d19.3d22.4d18.8d15.6d
Mixed 3.8d2.6d1.3d0.1d0.0d0.0d0.0d0.0d0.0d0.2d1.8d3.3d
Snow 1.7d1.0d0.3d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.6d1.5d
Any 19.9d16.6d17.2d15.3d13.7d13.8d14.9d17.0d19.3d22.7d21.2d20.4d

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 Airport experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year at Wrangell Airport. The month with the most rain at Wrangell Airport is October, with an average rainfall of 15.1 inches.

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

Average Monthly Rainfall at Wrangell Airport

Average Monthly Rainfall at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 inOct 1515.1 inOct 1515.1 inJun 54.6 inJun 54.6 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 10.4″8.7″7.9″6.8″5.0″4.7″5.7″8.3″12.8″15.1″12.6″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 Airport experiences extreme seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.9 months, from October 29 to March 26, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Wrangell Airport is January, with an average snowfall of 11.4 inches.

The snowless period of the year lasts for 7.1 months, from March 26 to October 29. The least snow falls around July 15, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall at Wrangell Airport

Average Monthly Snowfall at Wrangell AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 in30 in30 inJan 1311.6 inJan 1311.6 inJul 150.0 inJul 150.0 inOct 291.0 inOct 291.0 inMar 261.0 inMar 261.0 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 11.4″6.7″2.1″0.0″0.0″0.0″0.0″0.0″0.0″0.3″3.4″8.7″

The length of the day at Wrangell Airport 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 at Wrangell Airport

Hours of Daylight and Twilight at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec0 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 27. The earliest sunset is at 3:11 PM on December 14, and the latest sunset is 6 hours, 33 minutes later at 9:44 PM on June 23.

Daylight saving time (DST) is observed at Wrangell Airport 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 at Wrangell Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 173:58 AMJun 173:58 AM9:44 PMJun 239:44 PMJun 23Dec 143:11 PMDec 143:11 PM8:24 AMDec 278:24 AMDec 27Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 at Wrangell Airport

Solar Elevation and Azimuth at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec12 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 at Wrangell Airport

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 at Wrangell Airport, 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 at Wrangell Airport

Humidity Comfort Levels at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec0%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 at Wrangell Airport 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 8, with average wind speeds of more than 6.4 miles per hour. The windiest month of the year at Wrangell Airport is January, with an average hourly wind speed of 8.4 miles per hour.

The calmer time of year lasts for 5.9 months, from April 8 to October 4. The calmest month of the year at Wrangell Airport is July, with an average hourly wind speed of 4.4 miles per hour.

Average Wind Speed at Wrangell Airport

Average Wind Speed at Wrangell AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 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 86.4 mphApr 86.4 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) 8.47.87.26.25.04.64.44.75.76.97.98.3

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

The wind is most often from the south for 1.1 weeks, from June 15 to June 23 and for 1.6 months, from August 5 to September 23, with a peak percentage of 38% on September 16. The wind is most often from the west for 1.4 months, from June 23 to August 5, with a peak percentage of 38% 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 at Wrangell Airport

Wind Direction at Wrangell AirportEWSEJanFebMarAprMayJunJulAugSepOctNovDec0%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 Airport 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 at Wrangell Airport 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 at Wrangell Airport with the coolest water is March, with an average temperature of 41°F.

Average Water Temperature at Wrangell Airport

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 at Wrangell Airport 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 Airport for general outdoor tourist activities is from mid July to mid August, with a peak score in the last week of July.

Tourism Score at Wrangell Airport

Tourism Score at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.43.40.00.0NowNowtemperaturetemperature 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 Airport for hot-weather activities is from late July to early August.

Beach/Pool Score at Wrangell Airport

Beach/Pool Score at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec002244668810100.10.10.00.0NowNowtemperaturetemperature 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 at Wrangell Airport typically lasts for 6.7 months (205 days), from around April 11 to around November 2, rarely starting before March 19 or after April 30, and rarely ending before October 9 or after November 24.

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

Time Spent in Various Temperature Bands and the Growing Season at Wrangell Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1150%Apr 1150%Nov 250%Nov 290%Apr 3090%Apr 3090%Oct 990%Oct 910%Mar 1910%Mar 1910%Nov 2410%Nov 240%Jan 280%Jan 28Jul 17100%Jul 17100%freezingvery 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 at Wrangell Airport should appear around June 2, only rarely appearing before May 20 or after June 18.

Growing Degree Days at Wrangell Airport

Growing Degree Days at Wrangell AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F100°F100°F200°F200°F300°F300°F400°F400°F500°F500°F600°F600°F700°F700°F800°F800°F900°F900°FJun 290°FJun 290°FDec 31762°FDec 31762°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 at Wrangell Airport 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 at Wrangell Airport is December, with an average of 0.3 kWh.

Average Daily Incident Shortwave Solar Energy at Wrangell Airport

Average Daily Incident Shortwave Solar Energy at Wrangell AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 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 Airport are 56.484 deg latitude, -132.370 deg longitude, and 20 ft elevation.

The topography within 2 miles of Wrangell Airport contains very significant variations in elevation, with a maximum elevation change of 1,056 feet and an average elevation above sea level of 52 feet. Within 10 miles contains very significant variations in elevation (3,688 feet). Within 50 miles also contains extreme variations in elevation (9,918 feet).

The area within 2 miles of Wrangell Airport is covered by water (70%) and trees (22%), within 10 miles by water (49%) and trees (40%), and within 50 miles by trees (44%) and water (22%).

This report illustrates the typical weather at Wrangell Airport, 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

Wrangell Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Petersburg James A. Johnson Airport, Klawock Airport, Hydaburg Seaplane Base, Ketchikan International Airport, Metlakatla Seaplane Base, Kake Airport, Annette Island Airport, and Angoon Seaplane Base.

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.