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April Weather at Atka Airport Alaska, United States

Daily high temperatures increase by 3°F, from 39°F to 42°F, rarely falling below 35°F or exceeding 46°F.

Daily low temperatures increase by 3°F, from 32°F to 35°F, rarely falling below 27°F or exceeding 39°F.

For reference, on August 13, the hottest day of the year, temperatures at Atka Airport typically range from 47°F to 55°F, while on January 24, the coldest day of the year, they range from 30°F to 36°F.

Average High and Low Temperature in April at Atka Airport

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.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. The horizontal axis is the day, 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 April at Atka Airport

Average Hourly Temperature in April at Atka AirportApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMayNowNowvery cold
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.

Ólafsvík, Iceland (4,198 miles away) is the far-away foreign place with temperatures most similar to Atka Airport (view comparison).

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The month of April at Atka Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 66% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 63% on April 20.

The clearest day of the month is April 20, with clear, mostly clear, or partly cloudy conditions 37% of the time.

For reference, on July 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 85%, while on October 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 42%.

Cloud Cover Categories in April at Atka Airport

Cloud Cover Categories in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayJul 515%Jul 515%Apr 132%Apr 132%Apr 3036%Apr 3036%Apr 1136%Apr 1136%Apr 2136%Apr 2136%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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Atka Airport, the chance of a wet day over the course of April is rapidly decreasing, starting the month at 30% and ending it at 23%.

For reference, the year's highest daily chance of a wet day is 43% on November 27, and its lowest chance is 23% on May 4.

Over the course of April at Atka Airport, the chance of a day with only rain decreases from 27% to 23%, the chance of a day with mixed snow and rain decreases from 3% to 1%, and the chance of a day with only snow remains an essentially constant 0% throughout.

Probability of Precipitation in April at Atka Airport

Probability of Precipitation in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%MarMayApr 130%Apr 130%Apr 3023%Apr 3023%Apr 1128%Apr 1128%Apr 2125%Apr 2125%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).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during April at Atka Airport is gradually decreasing, starting the month at 1.8 inches, when it rarely exceeds 3.0 inches or falls below 0.8 inches, and ending the month at 1.4 inches, when it rarely exceeds 2.5 inches or falls below 0.5 inches.

Average Monthly Rainfall in April at Atka Airport

Average Monthly Rainfall in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 inMarMayApr 11.8 inApr 11.8 inApr 301.4 inApr 301.4 inApr 111.6 inApr 111.6 inApr 211.5 inApr 211.5 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.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during April at Atka Airport is gradually decreasing, starting the month at 1.0 inches, when it rarely exceeds 3.2 inches or falls below -0.0 inches, and ending the month at 0.2 inches, when it rarely exceeds 0.3 inches or falls below -0.0 inches.

Average Monthly Snowfall in April at Atka Airport

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.

Over the course of April at Atka Airport, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 53 minutes, implying an average daily increase of 3 minutes, 53 seconds, and weekly increase of 27 minutes, 12 seconds.

The shortest day of the month is April 1, with 13 hours, 3 minutes of daylight and the longest day is April 30, with 14 hours, 56 minutes of daylight.

Hours of Daylight and Twilight in April at Atka Airport

Hours of Daylight and Twilight in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrMarMaynightnightdaydayApr 113 hr, 3 minApr 113 hr, 3 minApr 3014 hr, 56 minApr 3014 hr, 56 minApr 1614 hr, 3 minApr 1614 hr, 3 minNowNow
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.

The latest sunrise of the month at Atka Airport is 8:09 AM on April 1 and the earliest sunrise is 1 hour, 3 minutes earlier at 7:06 AM on April 30.

The earliest sunset is 9:12 PM on April 1 and the latest sunset is 50 minutes later at 10:02 PM on April 30.

Daylight saving time is observed at Atka Airport during 2024, but it neither starts nor ends during April, so the entire month is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 6:15 AM and sets 16 hours, 47 minutes later, at 11:01 PM, while on December 21, the shortest day of the year, it rises at 9:44 AM and sets 7 hours, 42 minutes later, at 5:26 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in April at Atka Airport

Sunrise & Sunset with Twilight and Daylight Saving Time in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMMarMay7:06 AM7:06 AMApr 3010:02 PMApr 3010:02 PM8:09 AM8:09 AMApr 19:12 PMApr 19:12 PM7:46 AM7:46 AMApr 119:29 PMApr 119:29 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. 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 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 April at Atka Airport

Solar Elevation and Azimuth in April at Atka AirportApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMay0010102020203030405000010102020303030404050NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 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 April 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in April at Atka Airport

Moon Rise, Set & Phases in April at Atka AirportApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 911:01 PMMar 911:01 PMMar 2410:01 PMMar 2410:01 PMApr 89:22 AMApr 89:22 AMApr 232:50 PMApr 232:50 PMMay 76:23 PMMay 76:23 PMMay 234:54 AMMay 234:54 AM8:13 AM8:13 AM7:05 PM7:05 PM8:46 PM8:46 PM8:42 AM8:42 AM7:55 AM7:55 AM10:05 PM10:05 PM10:13 PM10:13 PM7:23 AM7:23 AM6:29 AM6:29 AM10:36 PM10:36 PM10:34 PM10:34 PM6:07 AM6:07 AMNowNow
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.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%5:18 AMSE11:38 AMSW-8:28 AMS236,934 mi
2
43%6:05 AMSE12:54 PMSW-9:30 AMS233,548 mi
3
32%6:38 AMSE2:22 PMSW-10:30 AMS230,213 mi
4
21%7:01 AMESE3:55 PMWSW-11:27 AMS227,204 mi
5
12%7:17 AMESE5:28 PMWSW-12:21 PMS224,823 mi
6
5%7:31 AMESE7:00 PMW-1:13 PMS223,353 mi
7
1%7:43 AME8:32 PMW-2:04 PMS223,007 mi
8
0%7:55 AMENE10:05 PMWNW-2:54 PMS223,873 mi
9
2%8:09 AMENE11:39 PMWNW-3:46 PMS225,899 mi
10
8%8:26 AMNE--4:40 PMS228,892 mi
11
15%-1:12 AMNW8:50 AMNE5:37 PMS232,551 mi
12
24%-2:39 AMNW9:24 AMNE6:34 PMS236,525 mi
13
34%-3:53 AMNW10:12 AMNE7:31 PMS240,463 mi
14
44%-4:48 AMNW11:14 AMNE8:26 PMS244,065 mi
15
50%-5:26 AMNW12:27 PMNE9:17 PMS247,106 mi
16
64%-5:52 AMNW1:43 PMNE10:04 PMS249,450 mi
17
74%-6:10 AMWNW2:59 PMENE10:47 PMS251,037 mi
18
82%-6:23 AMWNW4:12 PMENE11:28 PMS251,874 mi
19
85%-6:33 AMWNW5:24 PMENE--
20
88%-6:43 AMW6:34 PME12:07 AMS252,018 mi
21
94%-6:51 AMW7:45 PME12:45 AMS251,557 mi
22
98%-7:00 AMWSW8:57 PMESE1:24 AMS250,597 mi
23
100%-7:10 AMWSW10:13 PMESE2:05 AMS249,239 mi
24
100%-7:23 AMWSW11:31 PMSE2:48 AMS247,574 mi
25
98%-7:40 AMSW-3:35 AMS245,675 mi
26
94%12:50 AMSE8:04 AMSW-4:27 AMS243,587 mi
27
87%2:06 AMSE8:40 AMSW-5:23 AMS241,342 mi
28
79%3:13 AMSE9:32 AMSW-6:22 AMS238,962 mi
29
70%4:04 AMSE10:41 AMSW-7:23 AMS236,481 mi
30
59%4:40 AMSE12:04 PMSW-8:22 AMS233,959 mi

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 chance that a given day will be muggy at Atka Airport is essentially constant during April, remaining around 0% throughout.

Humidity Comfort Levels in April at Atka Airport

Humidity Comfort Levels in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 160%Apr 160%Apr 10%Apr 10%Apr 300%Apr 300%drydry
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.

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 Atka Airport is rapidly decreasing during April, decreasing from 19.8 miles per hour to 17.6 miles per hour over the course of the month.

For reference, on November 23, the windiest day of the year, the daily average wind speed is 21.7 miles per hour, while on July 20, the calmest day of the year, the daily average wind speed is 12.0 miles per hour.

Average Wind Speed in April at Atka Airport

Average Wind Speed in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mph25 mph25 mph30 mph30 mphMarMayApr 119.8 mphApr 119.8 mphApr 3017.6 mphApr 3017.6 mphApr 1619.1 mphApr 1619.1 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction at Atka Airport throughout April is predominantly from the west, with a peak proportion of 35% on April 7.

Wind Direction in April at Atka Airport

Wind Direction in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowwestsoutheastnorth
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).

Atka 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 surface water temperature at Atka Airport is essentially constant during April, remaining around 39°F throughout.

Average Water Temperature in April at Atka Airport

Average Water Temperature in April at Atka AirportApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303037°F37°F38°F38°F39°F39°F40°F40°F41°F41°F42°F42°F43°F43°FMarMayApr 139°FApr 139°FApr 3039°FApr 3039°FApr 1139°FApr 1139°FApr 2139°FApr 2139°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Atka Airport typically lasts for 5.9 months (180 days), from around May 2 to around October 30, rarely starting before April 7 or after May 23, and rarely ending before October 7 or after November 27.

The month of April at Atka Airport is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season rapidly increasing from 6% to 44% over the course of the month.

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

Time Spent in Various Temperature Bands and the Growing Season in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 16%Apr 16%Apr 3044%Apr 3044%Apr 1114%Apr 1114%Apr 2127%Apr 2127%50%May 250%May 290%May 2390%May 23freezingvery coldcold
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.

The average accumulated growing degree days at Atka Airport are essentially constant during April, remaining around 0°F throughout.

Growing Degree Days in April at Atka Airport

Growing Degree Days in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0°F0.0°F0.1°F0.1°F0.2°F0.2°F0.3°F0.3°F0.4°F0.4°F0.5°F0.5°F0.6°F0.6°F0.7°F0.7°F0.8°F0.8°F0.9°F0.9°F1.0°F1.0°FMarMayApr 10°FApr 10°FApr 300°FApr 300°FApr 110°FApr 110°FApr 210°FApr 210°F
The average growing degree days accumulated over the course of April, 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 at Atka Airport is increasing during April, rising by 1.3 kWh, from 2.9 kWh to 4.2 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April at Atka Airport

Average Daily Incident Shortwave Solar Energy in April at Atka AirportApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhMarMayApr 12.9 kWhApr 12.9 kWhApr 304.2 kWhApr 304.2 kWhApr 113.4 kWhApr 113.4 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.

For the purposes of this report, the geographical coordinates of Atka Airport are 52.220 deg latitude, -174.207 deg longitude, and 36 ft elevation.

The topography within 2 miles of Atka Airport contains very significant variations in elevation, with a maximum elevation change of 1,138 feet and an average elevation above sea level of 263 feet. Within 10 miles contains very significant variations in elevation (4,757 feet). Within 50 miles also contains extreme variations in elevation (5,000 feet).

The area within 2 miles of Atka Airport is covered by shrubs (48%), water (27%), and grassland (15%), within 10 miles by water (43%) and shrubs (31%), and within 50 miles by water (93%).

This report illustrates the typical weather at Atka 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

Atka 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.

In this case, the only station close and reliable enough to use as a fallback is Adak Airport.

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.

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