Lewiston weather in April: Lewiston, Idaho: normal highs, lows, rain and records for April
Lewiston in April has a normal high of 62°F and a normal low of 41°F, a daily mean of 52°F, rising from 59°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 11 days in a normal April, 1.44 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 5°C, 37 mm of precipitation in April.
- NOAA stationLewiston Airport
- Station IDUSW00024149
- Location46.37°N 117.02°W
- Elevation1,436 ft (438 m)
- Population34,693
- Jan 42° 30°
- Feb 47° 32°
- Mar 55° 36°
- Apr 62° 41°
- May 72° 48°
- Jun 79° 54°
- Jul 91° 61°
- Aug 90° 60°
- Sep 80° 52°
- Oct 63° 42°
- Nov 49° 35°
- Dec 41° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lewiston in April?
The normal high is 62°F and the normal low 41°F, for a daily mean of 51.5°F. April is 6.1°F warmer than March and 8.5°F cooler than May. April is the 7th warmest month of the year in Lewiston and the 2nd wettest. Across the month the normal high rises 8°F, from 59°F on April 1 to 67°F on April 30. From one year to the next April's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 49°F and 54°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 39%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 59°F | 38°F | 39% | 14% |
| April 8 | 60°F | 39°F | 38% | 15% |
| April 15 | 62°F | 40°F | 37% | 15% |
| April 22 | 64°F | 42°F | 35% | 15% |
| April 30 | 67°F | 44°F | 34% | 16% |
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 | 59°F | 38°F | 39% | 14% | 12 h 50 min |
| April 2 | 59°F | 39°F | 39% | 14% | 12 h 50 min |
| April 3 | 59°F | 39°F | 39% | 15% | 12 h 50 min |
| April 4 | 59°F | 39°F | 39% | 15% | 13 h |
| April 5 | 59°F | 39°F | 39% | 15% | 13 h |
| April 6 | 60°F | 39°F | 39% | 15% | 13 h |
| April 7 | 60°F | 39°F | 39% | 15% | 13 h 10 min |
| April 8 | 60°F | 39°F | 38% | 15% | 13 h 10 min |
| April 9 | 60°F | 39°F | 38% | 15% | 13 h 10 min |
| April 10 | 61°F | 40°F | 38% | 15% | 13 h 10 min |
| April 11 | 61°F | 40°F | 38% | 15% | 13 h 20 min |
| April 12 | 61°F | 40°F | 38% | 15% | 13 h 20 min |
| April 13 | 61°F | 40°F | 37% | 15% | 13 h 20 min |
| April 14 | 62°F | 40°F | 37% | 15% | 13 h 30 min |
| April 15 | 62°F | 40°F | 37% | 15% | 13 h 30 min |
| April 16 | 62°F | 41°F | 37% | 15% | 13 h 30 min |
| April 17 | 62°F | 41°F | 36% | 15% | 13 h 40 min |
| April 18 | 63°F | 41°F | 36% | 15% | 13 h 40 min |
| April 19 | 63°F | 41°F | 36% | 15% | 13 h 40 min |
| April 20 | 63°F | 41°F | 36% | 15% | 13 h 50 min |
| April 21 | 64°F | 42°F | 35% | 15% | 13 h 50 min |
| April 22 | 64°F | 42°F | 35% | 15% | 13 h 50 min |
| April 23 | 64°F | 42°F | 35% | 16% | 14 h |
| April 24 | 65°F | 42°F | 35% | 16% | 14 h |
| April 25 | 65°F | 43°F | 35% | 16% | 14 h |
| April 26 | 66°F | 43°F | 35% | 16% | 14 h |
| April 27 | 66°F | 43°F | 35% | 16% | 14 h 10 min |
| April 28 | 66°F | 43°F | 35% | 16% | 14 h 10 min |
| April 29 | 67°F | 44°F | 35% | 16% | 14 h 10 min |
| April 30 | 67°F | 44°F | 34% | 16% | 14 h 20 min |
- Normal high
- 62°FApril average
- Normal low
- 41°FApril average
- Precipitation
- 1.44 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 2
- Daylight
- 12 h 50 min to 14 h 20 minApril 1 to April 30
- Days at 70°F or more
- 6
- Days at 80°F or more
- 1
- Sunshine
- 70%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024149; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lewiston in April?
On a given April day the chance of 0.01 inch or more is 37% on average, highest around April 1 (39%). In all, 1.44 in falls on 11 days of a normal April.
In a normal April in Lewiston, 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024149.
How humid and windy is Lewiston in April?
At 3 p.m. the normal temperature is 64°F with 36% relative humidity and a dew point of 37°F; at 6 a.m. it is 47°F with 71% humidity. The wind averages 5.9 mph, most often from the northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 47°F | 38°F | 71% | 4.0 mph | 58% |
| 9 a.m. | 55°F | 39°F | 56% | 5.8 mph | 60% |
| noon | 62°F | 38°F | 42% | 7.3 mph | 60% |
| 3 p.m. | 64°F | 37°F | 36% | 8.5 mph | 57% |
| 6 p.m. | 62°F | 37°F | 39% | 7.4 mph | 65% |
| 9 p.m. | 54°F | 38°F | 54% | 6.2 mph | 68% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024149. 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 Lewiston?
The warmest April temperature on Lewiston's official record (since 1881) is 98°F, on April 28, 1939; the coldest is 20°F, on April 19, 1966. The wettest April brought 3.29 in (1978); the snowiest, 1.1 inches (1972).
The April mean against the 1991-2020 normal of 51.5°F: 2021 53.4°F (+1.9), 2022 47.4°F (−4.1), 2023 51.3°F (−0.3), 2024 52.6°F (+1.1), 2025 53.2°F (+1.7), 2026 52.3°F (+0.8). 4 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.4°F | +1.9°F | 0.05 in |
| 2022 | 47.4°F | −4.1°F | 1.96 in |
| 2023 | 51.3°F | −0.3°F | 1.03 in |
| 2024 | 52.6°F | +1.1°F | 1.30 in |
| 2025 | 53.2°F | +1.7°F | 0.58 in |
| 2026 | 52.3°F | +0.8°F | 2.24 in |
Source: records: ACIS, NWS threaded record LWSthr; recent months: ACIS, station USW00024149. Records and recent months use complete months only.
How does April in Lewiston compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, April normal highs run from 40°F in Mullan to 68°F in Bruneau; Lewiston's is 62°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.