Anchorage weather in August: Anchorage, Alaska: normal highs, lows, rain and records for August
Anchorage in August has a normal high of 64°F and a normal low of 51°F, a daily mean of 58°F, falling from 66°F on the 1st to 61°F by the 31st. Measurable precipitation falls on 14 days in a normal August, 2.93 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 11°C, 74 mm of precipitation in August.
- NOAA stationAnchorage Ted Stevens International Airport
- Station IDUSW00026451
- Location61.17°N 150.03°W
- Elevation120 ft (37 m)
- Population289,600
- Jan 23° 11°
- Feb 27° 15°
- Mar 33° 19°
- Apr 45° 30°
- May 56° 40°
- Jun 63° 48°
- Jul 66° 53°
- Aug 64° 51°
- Sep 56° 43°
- Oct 42° 31°
- Nov 29° 18°
- Dec 25° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Anchorage in August?
The normal high is 64°F and the normal low 51°F, for a daily mean of 57.5°F. August is 2.1°F cooler than July and 8.2°F warmer than September. August is the 2nd warmest month of the year in Anchorage and the 2nd wettest. Across the month the normal high falls 5°F, from 66°F on August 1 to 61°F on August 31. From one year to the next August's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 56°F and 60°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 49%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 66°F | 53°F | 43% | 22% |
| August 8 | 66°F | 53°F | 44% | 24% |
| August 15 | 65°F | 51°F | 46% | 26% |
| August 22 | 63°F | 50°F | 48% | 27% |
| August 31 | 61°F | 48°F | 49% | 27% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 66°F | 53°F | 43% | 22% | 17 h 10 min |
| August 2 | 66°F | 53°F | 43% | 22% | 17 h 10 min |
| August 3 | 66°F | 53°F | 43% | 23% | 17 h |
| August 4 | 66°F | 53°F | 43% | 23% | 17 h |
| August 5 | 66°F | 53°F | 44% | 23% | 16 h 50 min |
| August 6 | 66°F | 53°F | 44% | 24% | 16 h 50 min |
| August 7 | 66°F | 53°F | 44% | 24% | 16 h 40 min |
| August 8 | 66°F | 53°F | 44% | 24% | 16 h 40 min |
| August 9 | 65°F | 52°F | 45% | 25% | 16 h 30 min |
| August 10 | 65°F | 52°F | 45% | 25% | 16 h 20 min |
| August 11 | 65°F | 52°F | 45% | 25% | 16 h 20 min |
| August 12 | 65°F | 52°F | 46% | 25% | 16 h 10 min |
| August 13 | 65°F | 52°F | 46% | 26% | 16 h 10 min |
| August 14 | 65°F | 52°F | 46% | 26% | 16 h |
| August 15 | 65°F | 51°F | 46% | 26% | 16 h |
| August 16 | 64°F | 51°F | 47% | 26% | 15 h 50 min |
| August 17 | 64°F | 51°F | 47% | 26% | 15 h 50 min |
| August 18 | 64°F | 51°F | 47% | 27% | 15 h 40 min |
| August 19 | 64°F | 51°F | 47% | 27% | 15 h 30 min |
| August 20 | 64°F | 50°F | 47% | 27% | 15 h 30 min |
| August 21 | 63°F | 50°F | 48% | 27% | 15 h 20 min |
| August 22 | 63°F | 50°F | 48% | 27% | 15 h 20 min |
| August 23 | 63°F | 50°F | 48% | 27% | 15 h 10 min |
| August 24 | 63°F | 49°F | 48% | 27% | 15 h 10 min |
| August 25 | 62°F | 49°F | 48% | 27% | 15 h |
| August 26 | 62°F | 49°F | 49% | 27% | 15 h |
| August 27 | 62°F | 49°F | 49% | 27% | 14 h 50 min |
| August 28 | 62°F | 48°F | 49% | 27% | 14 h 40 min |
| August 29 | 61°F | 48°F | 49% | 27% | 14 h 40 min |
| August 30 | 61°F | 48°F | 49% | 27% | 14 h 30 min |
| August 31 | 61°F | 48°F | 49% | 27% | 14 h 30 min |
- Normal high
- 64°FAugust average
- Normal low
- 51°FAugust average
- Precipitation
- 2.93 inmonth total
- Days with precipitation
- 140.01 inch or more
- Daylight
- 17 h 10 min to 14 h 30 minAugust 1 to August 31
- Days at 70°F or more
- 4
- Sunshine
- 64%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00026451; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Anchorage in August?
On a given August day the chance of 0.01 inch or more is 46% on average, highest around August 31 (49%). In all, 2.93 in falls on 14 days of a normal August.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00026451.
How humid and windy is Anchorage in August?
At 3 p.m. the normal temperature is 59°F with 63% relative humidity and a dew point of 47°F; at 6 a.m. it is 50°F with 84% humidity. The wind averages 6.5 mph, most often from the south-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 50°F | 45°F | 84% | 5.4 mph | – |
| 9 a.m. | 53°F | 46°F | 78% | 5.8 mph | 9% |
| noon | 57°F | 47°F | 68% | 6.7 mph | – |
| 3 p.m. | 59°F | 47°F | 63% | 7.3 mph | 8% |
| 6 p.m. | 58°F | 47°F | 66% | 7.5 mph | – |
| 9 p.m. | 54°F | 47°F | 77% | 6.7 mph | 9% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00026451. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Anchorage?
The warmest August temperature on Anchorage's official record (since 1953) is 82°F, on August 6, 1968; the coldest is 31°F, on August 31, 1984. The wettest August brought 9.77 in (1989).
The August mean against the 1991-2020 normal of 57.5°F: 2021 57.3°F (−0.2), 2022 56.1°F (−1.4), 2023 58.8°F (+1.3), 2024 56.1°F (−1.4), 2025 58.0°F (+0.5), 2026 57.5°F (at normal). 2 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 57.3°F | −0.2°F | 4.34 in |
| 2022 | 56.1°F | −1.4°F | 6.80 in |
| 2023 | 58.8°F | +1.3°F | 3.83 in |
| 2024 | 56.1°F | −1.4°F | 4.80 in |
| 2025 | 58.0°F | +0.5°F | 2.04 in |
| 2026 | 57.5°F | at normal | 1.32 in |
Source: records: ACIS, NWS threaded record ANCthr; recent months: ACIS, station USW00026451. Records and recent months use complete months only.
How does August in Anchorage compare across Alaska?
Across the 85 places PlainClimate covers in Alaska, August normal highs run from 45°F in Utqiaġvik to 68°F in Two Rivers; Anchorage's is 64°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.