Iliamna weather in April: Iliamna, Alaska: normal highs, lows, rain and records for April
Iliamna in April has a normal high of 43°F and a normal low of 29°F, a daily mean of 36°F, rising from 36°F on the 1st to 50°F by the 30th. Measurable precipitation falls on 8 days in a normal April, 0.83 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 6°C and low of −2°C, 21 mm of precipitation in April.
- 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 April?
The normal high is 43°F and the normal low 29°F, for a daily mean of 36.1°F. April is 12.4°F warmer than March and 10.2°F cooler than May. April is the 7th warmest month of the year in Iliamna and the 12th wettest. Across the month the normal high rises 14°F, from 36°F on April 1 to 50°F on April 30. From one year to the next April's mean temperature typically moves about 3.4°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 33°F and 40°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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 36°F | 20°F | 25% | 10% |
| April 8 | 39°F | 25°F | 25% | 10% |
| April 15 | 43°F | 29°F | 26% | 10% |
| April 22 | 47°F | 33°F | 27% | 11% |
| April 30 | 50°F | 35°F | 27% | 11% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 36°F | 20°F | 25% | 10% | 13 h 10 min |
| April 2 | 36°F | 21°F | 25% | 10% | 13 h 20 min |
| April 3 | 37°F | 22°F | 25% | 10% | 13 h 20 min |
| April 4 | 37°F | 22°F | 25% | 10% | 13 h 30 min |
| April 5 | 38°F | 23°F | 25% | 10% | 13 h 30 min |
| April 6 | 38°F | 24°F | 25% | 10% | 13 h 40 min |
| April 7 | 39°F | 24°F | 25% | 10% | 13 h 40 min |
| April 8 | 39°F | 25°F | 25% | 10% | 13 h 50 min |
| April 9 | 40°F | 25°F | 26% | 10% | 13 h 50 min |
| April 10 | 40°F | 26°F | 26% | 10% | 14 h |
| April 11 | 41°F | 27°F | 26% | 10% | 14 h 10 min |
| April 12 | 42°F | 27°F | 26% | 10% | 14 h 10 min |
| April 13 | 42°F | 28°F | 26% | 10% | 14 h 20 min |
| April 14 | 43°F | 29°F | 26% | 10% | 14 h 20 min |
| April 15 | 43°F | 29°F | 26% | 10% | 14 h 30 min |
| April 16 | 44°F | 30°F | 26% | 10% | 14 h 30 min |
| April 17 | 44°F | 30°F | 26% | 10% | 14 h 40 min |
| April 18 | 45°F | 31°F | 27% | 11% | 14 h 40 min |
| April 19 | 45°F | 31°F | 27% | 11% | 14 h 50 min |
| April 20 | 46°F | 32°F | 27% | 11% | 14 h 50 min |
| April 21 | 46°F | 32°F | 27% | 11% | 15 h |
| April 22 | 47°F | 33°F | 27% | 11% | 15 h |
| April 23 | 47°F | 33°F | 27% | 11% | 15 h 10 min |
| April 24 | 48°F | 34°F | 27% | 11% | 15 h 10 min |
| April 25 | 48°F | 34°F | 27% | 11% | 15 h 20 min |
| April 26 | 49°F | 34°F | 27% | 11% | 15 h 30 min |
| April 27 | 49°F | 35°F | 27% | 11% | 15 h 30 min |
| April 28 | 50°F | 35°F | 27% | 11% | 15 h 40 min |
| April 29 | 50°F | 35°F | 27% | 11% | 15 h 40 min |
| April 30 | 50°F | 35°F | 27% | 11% | 15 h 50 min |
- Normal high
- 43°FApril average
- Normal low
- 29°FApril average
- Precipitation
- 0.83 inmonth total
- Days with precipitation
- 80.01 inch or more
- Nights at 32°F or colder
- 20
- Daylight
- 13 h 10 min to 15 h 50 minApril 1 to April 30
- Sunshine
- 62%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 April?
On a given April day the chance of 0.01 inch or more is 26% on average, highest around April 29 (27%). In all, 0.83 in falls on 8 days of a normal April.
In a normal April in Iliamna, 20 nights fall to freezing and 3 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00025506.
How humid and windy is Iliamna in April?
At 3 p.m. the normal temperature is 46°F with 56% relative humidity and a dew point of 31°F; at 6 a.m. it is 34°F with 81% humidity. The wind averages 8.8 mph, most often from the 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. | 34°F | 29°F | 81% | 7.0 mph | – |
| 9 a.m. | 40°F | 30°F | 69% | 8.5 mph | 33% |
| noon | 44°F | 31°F | 60% | 10.7 mph | 37% |
| 3 p.m. | 46°F | 31°F | 56% | 11.7 mph | 23% |
| 6 p.m. | 45°F | 30°F | 56% | 10.8 mph | – |
| 9 p.m. | 40°F | 30°F | 67% | 7.2 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 April in Iliamna?
The warmest April temperature on this station's record (since 1920) is 67°F, on April 28, 2005; the coldest is −30°F, on April 1, 1920. The wettest April brought 3.85 in (1921); the snowiest, 16.7 inches (1952).
The April mean against the 1991-2020 normal of 36.1°F: 2021 30.7°F (−5.4), 2022 34.7°F (−1.4), 2023 24.5°F (−11.6), 2024 29.4°F (−6.7), 2025 35.8°F (−0.3), 2026 32.6°F (−3.5). 0 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 30.7°F | −5.4°F | 0.67 in |
| 2022 | 34.7°F | −1.4°F | 0.05 in |
| 2023 | 24.5°F | −11.6°F | 0.75 in |
| 2024 | 29.4°F | −6.7°F | 0.47 in |
| 2025 | 35.8°F | −0.3°F | 1.44 in |
| 2026 | 32.6°F | −3.5°F | 1.83 in |
Source: records: ACIS, station USW00025506; recent months: ACIS, station USW00025506. Records and recent months use complete months only.
How does April in Iliamna compare across Alaska?
Across the 85 places PlainClimate covers in Alaska, April normal highs run from 10°F in Nuiqsut to 51°F in Hyder; Iliamna's is 43°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.