Alaska (Ketchikan)
August
Weather in Alaska for August 2025
Your guide to Alaska weather in August - trends and predictions
The forecast for the first days of August 2025 in Alaska predicts temperatures to be around 16 °F, close to the historical average.
In general, the average temperature in Alaska at the beginning of August is 15.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 13.4 °F by the end of August.
The climate of Alaska in August is notably wet, with an average of 12 rainy days, and a total of 172.4 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
12
Rainy days
0
Snow days
17°/11°
Temperatures
11 km/h
Avg max wind
78 %
Avg humidity
Alaska Weather August
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What’s the Weather Like in Alaska This August?
Discover the average temperatures and weather trends across Alaska’s cities this August.
Temperatures trend during August in Alaska
See the weather trend as well as the moving average line
August weather in Alaska day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Moderate rain | 15° /12° | 15.3 mm | 1.7 | |
| Aug. 2 |  Mist | 18° /10° | 0 mm | 1.7 | |
| Aug. 3 |  Partly cloudy | 17° /12° | 0 mm | 0 | |
| Aug. 4 |  Patchy rain possible | 13° /11° | 1 mm | 3 | |
| Aug. 5 | Patchy rain possible | 12° /9° | 1.9 mm | 3 | |
| Aug. 6 | Moderate rain | 17° /11° | 5.2 mm | 3 | |
| Aug. 7 | Patchy rain possible | 15° /11° | 1.4 mm | 3 | |
| Aug. 8 | Patchy rain possible | 16° /12° | 1.4 mm | 3 | |
| Aug. 9 |  Sunny | 18° /10° | 0 mm | 4 | |
| Aug. 10 | Patchy rain possible | 14° /12° | 4.5 mm | 3 | |
| Aug. 11 | Patchy rain possible | 16° /13° | 1.6 mm | 3 | |
| Aug. 12 |  Cloudy | 21° /16° | 0 mm | 4 | |
| Aug. 13 | Patchy rain possible | 17° /11° | 0.3 mm | 4 | |
| Aug. 14 | Sunny | 17° /9° | 0 mm | 5 | |
| Aug. 15 | Sunny | 18° /10° | 0 mm | 5 | |
| Aug. 16 | Sunny | 19° /11° | 0 mm | 5 | |
| Aug. 17 | Partly cloudy | 19° /11° | 0 mm | 5 | |
| Aug. 18 | Sunny | 22° /13° | 0 mm | 6 | |
| Aug. 19 | Light rain shower | 15° /13° | 6.6 mm | 4 | |
| Aug. 20 | Light rain shower | 13° /10° | 4.4 mm | 3 | |
| Aug. 21 | Sunny | 17° /9° | 0.1 mm | 5 | |
| Aug. 22 | Cloudy | 17° /11° | 1 mm | 4 | |
| Aug. 23 |  Light drizzle | 13° /11° | 2.9 mm | 3 | |
| Aug. 24 | Patchy rain possible | 16° /12° | 1.6 mm | 4 | |
| Aug. 25 | Moderate rain | 12° /11° | 89.6 mm | 3 | |
| Aug. 26 | Patchy light drizzle | 14° /9° | 7.9 mm | 3 | |
| Aug. 27 | Partly cloudy | 15° /8° | 0 mm | 5 | |
| Aug. 28 | Moderate rain | 12° /11° | 9.5 mm | 3 | |
| Aug. 29 | Patchy rain possible | 14° /10° | 2 mm | 3 | |
| Aug. 30 | Light rain shower | 12° /10° | 21.9 mm | 3 | |
| Aug. 31 | Light rain | 15° /13° | 22.3 mm | 4 | |
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Important Notice
Our weather forecast for Alaska in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Alaska forecast closer to your planned date for the most up-to-date weather information.
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Alaska in August - FAQ
What are the expected maximum and minimum temperatures in Alaska during August?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Alaska during August?
Significant rainfall exceeding 172.4 mm is expected in Alaska during August, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Alaska during August?
The average wind speed in Alaska during August is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Alaska
Explore the daily rainfall trends and prepare for Alaskas August weather 💧
UV exposure in Alaska during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
Counties in Alaska
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Top locations in Alaska
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AnchorageDenali National ParkFairbanksGlacier Bay National Park and PreserveJuneauKetchikanSitkaSkagwayValdezWhittier
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