Boise, ID 14-Day Forecast
Idaho, United States 🇺🇸
The 14-day forecast for Boise is temporarily unavailable - please check back shortly. Meanwhile, the monthly averages below give a reliable picture of what to expect.
Boise 14-day outlook: the story
September to October and April is the sweet spot for Boise - temperatures sit either side of the peak heat rather than in it. Expect 72°F (22°C) in the afternoon and around 4 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in September.
For typical conditions month by month, see the Boise climate & average temperatures guide.
Average temperatures in Boise by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 39° | 25° | 10 | 2.0 in | 6.4 h/day | 9.3 h | 34% | 75% |
| February | 45° | 28° | 10 | 1.6 in | 7.5 h/day | 10.4 h | 34% | 66% |
| March | 54° | 34° | 10 | 1.6 in | 9.2 h/day | 11.8 h | 32% | 59% |
| April | 62° | 39° | 7 | 1.3 in | 10.9 h/day | 13.4 h | 23% | 50% |
| May | 71° | 48° | 8 | 1.6 in | 12.2 h/day | 14.7 h | 26% | 49% |
| June | 83° | 57° | 3 | 0.9 in | 13.4 h/day | 15.4 h | 11% | 40% |
| July | 94° | 65° | 1 | 0.1 in | 14.0 h/day | 15.1 h | 3% | 27% |
| August | 91° | 64° | 1 | 0.1 in | 12.9 h/day | 14.0 h | 3% | 30% |
| September | 80° | 55° | 3 | 0.5 in | 11.1 h/day | 12.4 h | 10% | 39% |
| October | 65° | 43° | 5 | 1.0 in | 9.2 h/day | 10.9 h | 15% | 53% |
| November | 49° | 32° | 8 | 1.4 in | 7.1 h/day | 9.6 h | 27% | 65% |
| December | 38° | 25° | 12 | 2.2 in | 5.6 h/day | 8.9 h | 37% | 75% |
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