Boise weather in April: Boise, Idaho: normal highs, lows, rain and records for April
Boise in April has a normal high of 62°F and a normal low of 40°F, a daily mean of 51°F, rising from 59°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 9 days in a normal April, 1.23 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 4°C, 31 mm of precipitation and 0 cm of snow in April.
- NOAA stationBoise Air Terminal
- Station IDUSW00024131
- Location43.57°N 116.24°W
- Elevation2,814 ft (858 m)
- From the center2 miles
- Population237,963
- Jan 39° 26°
- Feb 46° 29°
- Mar 56° 35°
- Apr 62° 40°
- May 72° 48°
- Jun 81° 54°
- Jul 93° 62°
- Aug 91° 61°
- Sep 80° 53°
- Oct 65° 42°
- Nov 49° 32°
- Dec 39° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Boise in April?
The normal high is 62°F and the normal low 40°F, for a daily mean of 50.9°F. April is 5.7°F warmer than March and 9.0°F cooler than May. April is the 7th warmest month of the year in Boise and the 5th 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 2.6°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 48°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 59°F | 37°F | 32% | 15% |
| April 8 | 60°F | 38°F | 32% | 15% |
| April 15 | 62°F | 39°F | 30% | 14% |
| April 22 | 64°F | 41°F | 29% | 13% |
| April 30 | 67°F | 43°F | 28% | 13% |
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 | 37°F | 32% | 15% | 12 h 40 min |
| April 2 | 59°F | 37°F | 32% | 15% | 12 h 40 min |
| April 3 | 59°F | 38°F | 32% | 15% | 12 h 50 min |
| April 4 | 59°F | 38°F | 32% | 15% | 12 h 50 min |
| April 5 | 59°F | 38°F | 32% | 15% | 12 h 50 min |
| April 6 | 60°F | 38°F | 32% | 15% | 13 h |
| April 7 | 60°F | 38°F | 32% | 15% | 13 h |
| April 8 | 60°F | 38°F | 32% | 15% | 13 h |
| April 9 | 60°F | 38°F | 31% | 15% | 13 h 10 min |
| April 10 | 61°F | 38°F | 31% | 15% | 13 h 10 min |
| April 11 | 61°F | 39°F | 31% | 14% | 13 h 10 min |
| April 12 | 61°F | 39°F | 31% | 14% | 13 h 10 min |
| April 13 | 61°F | 39°F | 31% | 14% | 13 h 20 min |
| April 14 | 62°F | 39°F | 31% | 14% | 13 h 20 min |
| April 15 | 62°F | 39°F | 30% | 14% | 13 h 20 min |
| April 16 | 62°F | 39°F | 30% | 14% | 13 h 30 min |
| April 17 | 62°F | 40°F | 30% | 14% | 13 h 30 min |
| April 18 | 63°F | 40°F | 30% | 14% | 13 h 30 min |
| April 19 | 63°F | 40°F | 30% | 14% | 13 h 30 min |
| April 20 | 63°F | 40°F | 29% | 14% | 13 h 40 min |
| April 21 | 64°F | 40°F | 29% | 13% | 13 h 40 min |
| April 22 | 64°F | 41°F | 29% | 13% | 13 h 40 min |
| April 23 | 64°F | 41°F | 29% | 13% | 13 h 50 min |
| April 24 | 65°F | 41°F | 29% | 13% | 13 h 50 min |
| April 25 | 65°F | 42°F | 29% | 13% | 13 h 50 min |
| April 26 | 66°F | 42°F | 29% | 13% | 13 h 50 min |
| April 27 | 66°F | 42°F | 29% | 13% | 14 h |
| April 28 | 66°F | 42°F | 28% | 13% | 14 h |
| April 29 | 67°F | 43°F | 28% | 13% | 14 h |
| April 30 | 67°F | 43°F | 28% | 13% | 14 h |
- Normal high
- 62°FApril average
- Normal low
- 40°FApril average
- Precipitation
- 1.23 inmonth total
- Days with precipitation
- 90.01 inch or more
- Snowfall
- 0.1 inmonth total
- Nights at 32°F or colder
- 5
- Daylight
- 12 h 40 min to 14 hApril 1 to April 30
- Days at 70°F or more
- 7
- Days at 80°F or more
- 1
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024131; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Boise in April?
On a given April day the chance of 0.01 inch or more is 30% on average, highest around April 1 (32%). In all, 1.23 in falls on 9 days of a normal April.
In a normal April in Boise, 5 nights fall to freezing and snowfall averages 0.1 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024131.
How humid and windy is Boise in April?
At 3 p.m. the normal temperature is 64°F with 30% relative humidity and a dew point of 32°F; at 6 a.m. it is 44°F with 67% humidity. The wind averages 8.6 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. | 44°F | 34°F | 67% | 6.5 mph | 65% |
| 9 a.m. | 53°F | 35°F | 51% | 8.2 mph | 70% |
| noon | 60°F | 34°F | 37% | 10.2 mph | 67% |
| 3 p.m. | 64°F | 32°F | 30% | 10.6 mph | 66% |
| 6 p.m. | 64°F | 31°F | 30% | 11.3 mph | 71% |
| 9 p.m. | 56°F | 34°F | 44% | 7.3 mph | 73% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024131. 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 Boise?
The warmest April temperature on Boise's official record (since 1875) is 92°F, on April 26, 1898; the coldest is 11°F, on April 1, 1936. The wettest April brought 3.87 in (2026); the snowiest, 8.0 inches (1967).
The April mean against the 1991-2020 normal of 50.9°F: 2021 51.8°F (+0.9), 2022 46.7°F (−4.2), 2023 49.6°F (−1.3), 2024 51.7°F (+0.8), 2025 52.2°F (+1.3), 2026 51.4°F (+0.5). 4 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.8°F | +0.9°F | 0.96 in |
| 2022 | 46.7°F | −4.2°F | 1.15 in |
| 2023 | 49.6°F | −1.3°F | 0.61 in |
| 2024 | 51.7°F | +0.8°F | 2.37 in |
| 2025 | 52.2°F | +1.3°F | 0.43 in |
| 2026 | 51.4°F | +0.5°F | 3.87 in |
Source: records: ACIS, NWS threaded record BOIthr; recent months: ACIS, station USW00024131. Records and recent months use complete months only.
How does April in Boise 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; Boise's is 62°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.