Iliamna weather in August: Iliamna, Alaska: normal highs, lows, rain and records for August
Iliamna in August has a normal high of 64°F and a normal low of 50°F, a daily mean of 57°F, falling from 65°F on the 1st to 61°F by the 31st. Measurable precipitation falls on 16 days in a normal August, 4.14 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 10°C, 105 mm of precipitation in August.
- NOAA stationIliamna Airport
- Station IDUSW00025506
- Location59.75°N 154.91°W
- Elevation143 ft (44 m)
- Population (census place)45
- Jan 25° 12°
- Feb 30° 16°
- Mar 32° 16°
- Apr 43° 29°
- May 55° 38°
- Jun 62° 45°
- Jul 65° 51°
- Aug 64° 50°
- Sep 56° 43°
- Oct 45° 32°
- Nov 33° 21°
- Dec 28° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Iliamna in August?
The normal high is 64°F and the normal low 50°F, for a daily mean of 56.7°F. August is 1.1°F cooler than July and 7.0°F warmer than September. August is the 2nd warmest month of the year in Iliamna and the 2nd wettest. Across the month the normal high falls 4°F, from 65°F on August 1 to 61°F on August 31. From one year to the next August's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 55°F and 59°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 55%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 65°F | 51°F | 48% | 30% |
| August 8 | 65°F | 51°F | 50% | 31% |
| August 15 | 64°F | 50°F | 51% | 32% |
| August 22 | 63°F | 49°F | 53% | 32% |
| August 31 | 61°F | 48°F | 55% | 33% |
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 | 65°F | 51°F | 48% | 30% | 16 h 50 min |
| August 2 | 65°F | 51°F | 48% | 30% | 16 h 50 min |
| August 3 | 65°F | 51°F | 49% | 30% | 16 h 40 min |
| August 4 | 65°F | 51°F | 49% | 30% | 16 h 40 min |
| August 5 | 65°F | 51°F | 49% | 31% | 16 h 30 min |
| August 6 | 65°F | 51°F | 49% | 31% | 16 h 30 min |
| August 7 | 65°F | 51°F | 49% | 31% | 16 h 20 min |
| August 8 | 65°F | 51°F | 50% | 31% | 16 h 20 min |
| August 9 | 65°F | 51°F | 50% | 31% | 16 h 10 min |
| August 10 | 65°F | 51°F | 50% | 31% | 16 h 10 min |
| August 11 | 64°F | 51°F | 50% | 31% | 16 h |
| August 12 | 64°F | 51°F | 50% | 31% | 16 h |
| August 13 | 64°F | 51°F | 51% | 31% | 15 h 50 min |
| August 14 | 64°F | 50°F | 51% | 32% | 15 h 50 min |
| August 15 | 64°F | 50°F | 51% | 32% | 15 h 40 min |
| August 16 | 64°F | 50°F | 51% | 32% | 15 h 40 min |
| August 17 | 64°F | 50°F | 52% | 32% | 15 h 30 min |
| August 18 | 64°F | 50°F | 52% | 32% | 15 h 30 min |
| August 19 | 63°F | 50°F | 52% | 32% | 15 h 20 min |
| August 20 | 63°F | 50°F | 52% | 32% | 15 h 20 min |
| August 21 | 63°F | 50°F | 53% | 32% | 15 h 10 min |
| August 22 | 63°F | 49°F | 53% | 32% | 15 h 10 min |
| August 23 | 63°F | 49°F | 53% | 32% | 15 h |
| August 24 | 63°F | 49°F | 53% | 33% | 15 h |
| August 25 | 62°F | 49°F | 53% | 33% | 14 h 50 min |
| August 26 | 62°F | 49°F | 54% | 33% | 14 h 50 min |
| August 27 | 62°F | 49°F | 54% | 33% | 14 h 40 min |
| August 28 | 62°F | 48°F | 54% | 33% | 14 h 30 min |
| August 29 | 61°F | 48°F | 54% | 33% | 14 h 30 min |
| August 30 | 61°F | 48°F | 54% | 33% | 14 h 20 min |
| August 31 | 61°F | 48°F | 55% | 33% | 14 h 20 min |
- Normal high
- 64°FAugust average
- Normal low
- 50°FAugust average
- Precipitation
- 4.14 inmonth total
- Days with precipitation
- 160.01 inch or more
- Daylight
- 16 h 50 min to 14 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 3
- Sunshine
- 60%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00025506; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Iliamna in August?
On a given August day the chance of 0.01 inch or more is 51% on average, highest around August 31 (55%). In all, 4.14 in falls on 16 days of a normal August, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00025506.
How humid and windy is Iliamna in August?
At 3 p.m. the normal temperature is 57°F with 67% relative humidity and a dew point of 46°F; at 6 a.m. it is 48°F with 88% humidity. The wind averages 8.5 mph, most often from the south-southeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 48°F | 45°F | 88% | 7.6 mph | – |
| 9 a.m. | 51°F | 46°F | 82% | 8.2 mph | 24% |
| noon | 55°F | 46°F | 72% | 9.2 mph | – |
| 3 p.m. | 57°F | 46°F | 67% | 10.8 mph | 22% |
| 6 p.m. | 56°F | 46°F | 69% | 10.0 mph | 30% |
| 9 p.m. | 52°F | 46°F | 80% | 7.9 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00025506. 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 Iliamna?
The warmest August temperature on this station's record (since 1920) is 83°F, on August 7, 1968; the coldest is 22°F, on August 30, 1922. The wettest August brought 10.51 in (1985).
The August mean against the 1991-2020 normal of 56.7°F: 2021 53.5°F (−3.2), 2022 54.2°F (−2.5), 2023 56.0°F (−0.7), 2024 52.4°F (−4.3). 0 of 4 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.5°F | −3.2°F | 3.48 in |
| 2022 | 54.2°F | −2.5°F | 7.08 in |
| 2023 | 56.0°F | −0.7°F | 6.32 in |
| 2024 | 52.4°F | −4.3°F | 7.08 in |
Source: records: ACIS, station USW00025506; recent months: ACIS, station USW00025506. Records and recent months use complete months only.
How does August in Iliamna 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; Iliamna's is 64°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.