Boise, ID weather in April
Expect cool weather with some rain in Boise in April, with highs near 62°F and lows near 40°F. Rain falls on about 9 days. Good for outdoor plans.
- Normal high
- 62°F
- Normal low
- 40°F
- Wet days
- 9
- 1.2 in total
- Muggy days
- 0
- dew point 65°F+
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 59°F | 67°F |
| Normal low | 37°F | 43°F |
| Chance of a wet day | 32% | 29% |
| Sunrise / sunset | 7:26 am / 8:11 pm | 6:38 am / 8:45 pm |
| Daylight | 12.8 h | 14.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
A typical April day
- 6 am41°Fdew point 32°F
- 9 am49°Fdew point 33°F
- Noon56°Fdew point 32°F
- 3 pm60°Fdew point 30°F
- 6 pm59°Fdew point 30°F
- 9 pm52°Fdew point 32°F
NOAA hourly normals (local standard time) from Boise Air Terminal (4 mi away); average wind 9 mph; clear or few clouds in 63% of daytime hours, mostly cloudy or overcast in 29%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F10 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow9 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below5 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain and snow in April
Normal precipitation is 1.2 in; a dry April brings about 0.8 in and a wet one about 1.6 in (25th and 75th percentiles). Days with half an inch or more are rare. Normal snowfall is 0.1 in.
How April varies from year to year
- Warmest April, 1991-20202016: average high 69°F
- Coolest April2011: average high 57°F
- Wettest April2014: 2.1 in
- Driest April2008: 0.3 in
- Highest reading91°F (April 23, 2012)
- Lowest reading21°F (April 5, 1997)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 56°F | 62°F | 72°F |
| Normal low | 35°F | 40°F | 48°F |
| Wet days | 10 | 9 | 8 |
| Comfortable days | 4 | 10 | 16 |
| Daylight | 11.9 h | 13.4 h | 14.7 h |
Highs change by +6°F from March and +10°F into May.
Nearby alternatives in April
- Cooler: Sun Valley, ID93 mi · high 52°F · 7 wet days
How Boise ranks in April
- Normal high246th warmest of 378 cities; 1st of 2 in Idaho
- Wet days205th driest of 378
- Comfortable days196th most of 340
What to pack for Boise in April
- A warm jacket – lows near 40°F, highs near 62°F
- A rain jacket or umbrella – rain on about 9 days
Frost in April
The last spring frost typically comes around Apr 24; in 1 year in 10 it comes after May 9. All frost dates for Boise.
Heating and cooling
April has 424 heating degree days and 3 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How cold is Boise in April?
The normal high is 62°F and the normal low is 40°F. From 1991 to 2020 the coldest April reading was 21°F (most recently on April 5, 1997).
Does it rain a lot in Boise in April?
About 9 days in April have at least 0.01 in of precipitation, and the normal total is 1.2 in. The wettest April in 1991-2020 was in 2014 (2.2 in); the driest was in 2008 (0.3 in).
Does it snow in Boise in April?
Yes. Normal snowfall in April is 0.1 in.
Is April a good time to visit Boise?
April ranks 3rd of 12 months on our comfort score for Boise (66 out of 100). It has about 10 comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Boise Air Terminal (USW00024131), 3.7 mi SSW of the city center, 2,814 ft (114 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Boise Air Terminal/Gowen Fd Airport (726810-24131), 3.7 mi SSW of the city center, 2,823 ft (123 ft higher than the city). Hourly observations, 1991-2020.