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August Weather at Seldovia Airport Alaska, United States

Daily high temperatures decrease by 4°F, from 61°F to 57°F, rarely falling below 53°F or exceeding 66°F.

Daily low temperatures decrease by 4°F, from 49°F to 45°F, rarely falling below 39°F or exceeding 53°F.

For reference, on July 27, the hottest day of the year, temperatures at Seldovia Airport typically range from 49°F to 61°F, while on January 17, the coldest day of the year, they range from 21°F to 30°F.

Average High and Low Temperature in August at Seldovia 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 August. 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 August at Seldovia Airport

Average Hourly Temperature in August at Seldovia AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMJulSepvery coldvery coldcoldcool
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.

Vik, Norway (4,035 miles away) and Harstad, Norway (3,561 miles) are the far-away foreign places with temperatures most similar to Seldovia Airport (view comparison).

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The month of August at Seldovia Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 59% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 57% on August 27.

The clearest day of the month is August 27, with clear, mostly clear, or partly cloudy conditions 43% of the time.

For reference, on December 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 67%, while on November 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 45%.

Cloud Cover Categories in August at Seldovia Airport

Cloud Cover Categories in August at Seldovia AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepDec 1733%Dec 1733%Aug 140%Aug 140%Aug 3142%Aug 3142%Aug 1141%Aug 1141%Aug 2142%Aug 2142%clearmostly 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 Seldovia Airport, the chance of a wet day over the course of August is increasing, starting the month at 33% and ending it at 39%.

For reference, the year's highest daily chance of a wet day is 45% on September 22, and its lowest chance is 24% on June 24.

Probability of Precipitation in August at Seldovia Airport

Probability of Precipitation in August at Seldovia AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%JulSepAug 133%Aug 133%Aug 3139%Aug 3139%Aug 1134%Aug 1134%Aug 2136%Aug 2136%rain
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 August at Seldovia Airport is rapidly increasing, starting the month at 3.2 inches, when it rarely exceeds 5.0 inches or falls below 1.4 inches, and ending the month at 4.4 inches, when it rarely exceeds 6.7 inches or falls below 2.1 inches.

Average Monthly Rainfall in August at Seldovia Airport

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.

Over the course of August at Seldovia Airport, the length of the day is very rapidly decreasing. From the start to the end of the month, the length of the day decreases by 2 hours, 32 minutes, implying an average daily decrease of 5 minutes, 4 seconds, and weekly decrease of 35 minutes, 25 seconds.

The shortest day of the month is August 31, with 14 hours, 7 minutes of daylight and the longest day is August 1, with 16 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in August at Seldovia Airport

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 earliest sunrise of the month at Seldovia Airport is 5:53 AM on August 1 and the latest sunrise is 1 hour, 10 minutes later at 7:02 AM on August 31.

The latest sunset is 10:31 PM on August 1 and the earliest sunset is 1 hour, 22 minutes earlier at 9:09 PM on August 31.

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

For reference, on June 20, the longest day of the year, the Sun rises at 4:48 AM and sets 18 hours, 40 minutes later, at 11:28 PM, while on December 21, the shortest day of the year, it rises at 10:03 AM and sets 6 hours, 3 minutes later, at 4:06 PM.

Sunrise & Sunset with Twilight in August at Seldovia Airport

Sunrise & Sunset with Twilight in August at Seldovia AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMJulSep5:53 AM5:53 AMAug 110:31 PMAug 110:31 PM7:02 AM7:02 AMAug 319:09 PMAug 319:09 PM6:16 AM6:16 AM6:39 AM6:39 AMAug 219:38 PMAug 219:38 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of August. 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 August at Seldovia Airport

Solar Elevation and Azimuth in August at Seldovia AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMJulSep001010202020303040500001010202030304050
northeastsouthwest
Solar elevation and azimuth over the course of August 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 August 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 August at Seldovia Airport

Moon Rise, Set & Phases in August at Seldovia AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepJul 52:58 PMJul 52:58 PMJul 212:18 AMJul 212:18 AMAug 43:14 AMAug 43:14 AMAug 1910:26 AMAug 1910:26 AMSep 25:56 PMSep 25:56 PMSep 176:35 PMSep 176:35 PM3:26 AM3:26 AM11:44 PM11:44 PM5:01 AM5:01 AM5:44 AM5:44 AM11:02 PM11:02 PM10:06 PM10:06 PM6:03 AM6:03 AM6:25 AM6:25 AM9:15 PM9:15 PM8:20 PM8:20 PM8:43 AM8:43 AM
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.
Aug 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
7%1:13 AMNNE10:38 PMNNW-12:03 PMS241,171 mi
2
3%2:32 AMNNE10:53 PMNNW-12:57 PMS243,377 mi
3
0%4:08 AMNE11:00 PMNW-1:48 PMS245,496 mi
4
0%5:44 AMNE11:02 PMNW-2:35 PMS247,465 mi
5
2%7:16 AMENE11:03 PMWNW-3:18 PMS249,196 mi
6
6%8:42 AMENE11:03 PMWNW-3:59 PMS250,582 mi
7
12%10:04 AME11:02 PMW-4:38 PMS251,502 mi
8
18%11:25 AME11:02 PMW-5:16 PMS251,839 mi
9
27%12:46 PMESE11:01 PMWSW-5:55 PMS251,489 mi
10
36%2:09 PMESE11:01 PMWSW-6:36 PMS250,379 mi
11
45%3:36 PMSE11:02 PMSW-7:20 PMS248,485 mi
12
50%5:09 PMSE11:06 PMSW-8:08 PMS245,845 mi
13
66%6:45 PMSSE11:16 PMSSW-9:01 PMS242,567 mi
14
75%8:17 PMSSE11:40 PMSSW-9:59 PMS238,842 mi
15
84%9:21 PMSSE--11:00 PMS234,940 mi
16
88%-12:40 AMSSW9:50 PMSSE--
17
92%-2:17 AMSSW10:01 PMSE12:04 AMS231,189 mi
18
97%-4:10 AMSW10:06 PMSE1:05 AMS227,942 mi
19
100%-6:03 AMSW10:08 PMESE2:04 AMS225,509 mi
20
99%-7:53 AMWSW10:08 PME2:58 AMS224,115 mi
21
96%-9:38 AMW10:08 PME3:50 AMS223,855 mi
22
89%-11:22 AMW10:09 PMENE4:39 AMS224,687 mi
23
80%-1:07 PMWNW10:09 PMENE5:29 AMS226,453 mi
24
70%-2:54 PMNW10:11 PMNE6:19 AMS228,919 mi
25
58%-4:43 PMNW10:17 PMNE7:12 AMS231,818 mi
26
50%-6:28 PMNNW10:30 PMNNE8:06 AMS234,899 mi
27
36%-7:55 PMNNW11:04 PMNNE9:02 AMS237,957 mi
28
26%-8:44 PMNNW-9:59 AMS240,843 mi
29
17%12:14 AMNNE9:04 PMNNW-10:53 AMS243,468 mi
30
10%1:48 AMNNE9:11 PMNW-11:45 AMS245,786 mi
31
5%3:24 AMNE9:14 PMNW-12:32 PMS247,784 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 Seldovia Airport is essentially constant during August, remaining around 0% throughout.

Humidity Comfort Levels in August at Seldovia Airport

Humidity Comfort Levels in August at Seldovia AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JulSepAug 160%Aug 160%Aug 10%Aug 10%Aug 310%Aug 310%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 Seldovia Airport is increasing during August, increasing from 8.6 miles per hour to 10.5 miles per hour over the course of the month.

For reference, on January 8, the windiest day of the year, the daily average wind speed is 16.8 miles per hour, while on June 26, the calmest day of the year, the daily average wind speed is 7.9 miles per hour.

Average Wind Speed in August at Seldovia Airport

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction at Seldovia Airport during August is predominantly out of the south from August 1 to August 16 and the west from August 16 to August 31.

Wind Direction in August at Seldovia Airport

Wind Direction in August at Seldovia AirportSWEAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JulSepwestsoutheastnorth
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).

Seldovia 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 Seldovia Airport is essentially constant during August, remaining around 52°F throughout.

The highest average surface water temperature during August is 53°F on August 19.

Average Water Temperature in August at Seldovia Airport

Average Water Temperature in August at Seldovia AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313146°F46°F47°F47°F48°F48°F49°F49°F50°F50°F51°F51°F52°F52°F53°F53°F54°F54°F55°F55°F56°F56°FJulSepAug 1953°FAug 1953°FAug 152°FAug 152°FAug 3152°FAug 3152°FAug 1153°FAug 1153°F
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 Seldovia Airport typically lasts for 4.4 months (134 days), from around May 15 to around September 26, rarely starting before April 28 or after May 30, and rarely ending before September 9 or after October 13.

The month of August at Seldovia Airport is reliably fully within the growing season.

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

Time Spent in Various Temperature Bands and the Growing Season in August at Seldovia Airportgrowing seasonAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSep100%Aug 16100%Aug 1650%Sep 2650%Sep 2690%Sep 990%Sep 9Jul 16100%Jul 16100%very coldcoldcoolfreezing
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 Seldovia Airport are gradually increasing during August, increasing by 114°F, from 209°F to 323°F, over the course of the month.

Growing Degree Days in August at Seldovia Airport

The average growing degree days accumulated over the course of August, 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 Seldovia Airport is decreasing during August, falling by 1.2 kWh, from 4.6 kWh to 3.5 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in August at Seldovia Airport

Average Daily Incident Shortwave Solar Energy in August at Seldovia AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhJulSepAug 14.6 kWhAug 14.6 kWhAug 313.5 kWhAug 313.5 kWhAug 114.3 kWhAug 114.3 kWhAug 213.9 kWhAug 213.9 kWh
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 Seldovia Airport are 59.442 deg latitude, -151.704 deg longitude, and 26 ft elevation.

The topography within 2 miles of Seldovia Airport contains very significant variations in elevation, with a maximum elevation change of 1,906 feet and an average elevation above sea level of 357 feet. Within 10 miles contains very significant variations in elevation (3,799 feet). Within 50 miles also contains extreme variations in elevation (6,283 feet).

The area within 2 miles of Seldovia Airport is covered by trees (49%), water (37%), and shrubs (14%), within 10 miles by water (50%) and shrubs (25%), and within 50 miles by water (71%) and shrubs (12%).

This report illustrates the typical weather at Seldovia 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

Seldovia 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 Homer Airport, Kenai Municipal Airport, Soldotna Airport, Seward Airport, and Iliamna 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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