June
Best time
28.9°C / 13.8°C
3 rain days
hot, dry
- very low rainfall (only 3 rain days)
- outside peak hazard season
Best time to visit Boise
Boise, United States — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. The standouts: June, May, April.
Best months to visit
May
Best time
23.2°C / 9.1°C
8 rain days
warm
- comfortable temperatures (avg high 23.2°C / 74°F)
- manageable rain (8 days)
- outside peak hazard season
April
Best time
17.6°C / 4.3°C
7 rain days
mild
- manageable rain (7 days)
- outside peak hazard season
OK — shoulder months
July
OK
34.9°C / 18.6°C
1 rain days
hot, dry
- very low rainfall (only 1 rain days)
- outside peak hazard season
- warm evenings without humidity overload
March
OK
13.1°C / 1.5°C
9 rain days
cool
- manageable rain (9 days)
- outside peak hazard season
November
OK
9.8°C / 0.4°C
8 rain days
chilly
- manageable rain (8 days)
- outside peak hazard season
February
OK
7.7°C / -1.9°C
9 rain days
chilly, freezing nights
- manageable rain (9 days)
- outside peak hazard season
Months to skip
January
Skip
4.4°C / -3.6°C
10 rain days
cold, freezing nights, rainy
- freezing at night (-3.6°C)
December
Skip
3.9°C / -3.5°C
12 rain days
cold, freezing nights, rainy
- freezing at night (-3.5°C)
September
Skip
27.7°C / 12.8°C
3 rain days
⚠ peak season
warm, dry
- peak hurricane season
October
Skip
19°C / 6.8°C
5 rain days
⚠ peak season
mild
- peak hurricane season
August
Skip
33.6°C / 17.9°C
1 rain days
⚠ peak season
hot, dry
- dangerously hot (avg high 33.6°C)
- peak hurricane season
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.