Overall on the next 14 days there will be 3 days with snow in Boise and a total of 4.8 cm of snow.
It will be snowy on the following days:
Boise weather in May 2026
Click on a day for an hourly weather forecast
Thursday
May 7
0 mm
14° / 2°
Friday
May 8
0 mm
19° / 5°
Saturday
May 9
0 mm
24° / 9°
Sunday
May 10
0 mm
21° / 10°
Monday
May 11
0 mm
25° / 10°
Tuesday
May 12
0 mm
28° / 17°
Wednesday
May 13
0 mm
32° / 10°
Thursday
May 14
1.5 cm
12° / 1°
Friday
May 15
1.3 cm
4° / 1°
Saturday
May 16
0 mm
14° / 0°
Sunday
May 17
0 mm
23° / 6°
Monday
May 18
0 mm
15° / 7°
Tuesday
May 19
0 mm
14° / 5°
Wednesday
May 20
2.0 cm
5° / 3°
🌨️ Snowy days in Boise 2026 (May)
The average weather in Boise in May
The temperatures in Boise in May are quite cold with temperatures between 8°C and 19°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Boise during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Boise can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Boise in May 2026.
If you’re planning to visit Boise in the near future, we highly recommend that you review the 14 day weather forecast for Boise before you arrive.
Temperatures
19° / 8°
Rainy Days
4
Snowy Days
1
Dry Days
27
Rainfall
44
mm
Sun Hours
11.1
Hrs
Historic average weather for May
Click on a day for an hourly weather forecast
Explore the weather in Boise in other months
Boise annual weather
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -15° / -22° | 1 | 23 | 7 | 3 mm | Awful | Boise in January |
| February | -11° / -19° | 2 | 19 | 7 | 6 mm | Awful | Boise in February |
| March | 0° / -9° | 3 | 20 | 8 | 10 mm | Awful | Boise in March |
| April | 11° / 1° | 1 | 25 | 3 | 22 mm | Bad | Boise in April |
| May | 19° / 8° | 4 | 27 | 1 | 44 mm | Good | Boise in May |
| June | 24° / 15° | 5 | 25 | 0 | 60 mm | Perfect | Boise in June |
| July | 27° / 18° | 5 | 26 | 0 | 84 mm | Perfect | Boise in July |
| August | 25° / 16° | 3 | 28 | 0 | 57 mm | Perfect | Boise in August |
| September | 19° / 9° | 4 | 26 | 0 | 37 mm | Good | Boise in September |
| October | 9° / 1° | 2 | 26 | 3 | 24 mm | Bad | Boise in October |
| November | -3° / -9° | 2 | 21 | 8 | 12 mm | Awful | Boise in November |
| December | -13° / -19° | 1 | 22 | 7 | 4 mm | Awful | Boise in December |
Temperatures in Boise in May
Rain in Boise in May
Recommended Hotels in Boise
Weather in Boise in May - FAQ
What is the average temperature in Boise in May?
The average temperature in Boise in May is 8/19° C.
What is the chance of rain in Boise in May?
On average, there are 4 rainy days in Boise during May.
Weather wise, is May a good time to visit Boise?
The weather in Boise in May is good.
Can it snow in Boise in May?
On average, there are 1 snowy days in Boise in May.
More about the weather in Boise