Idaho Falls, ID 14-Day Forecast
Idaho, United States 🇺🇸
The 14-day forecast for Idaho Falls is temporarily unavailable - please check back shortly. Meanwhile, the monthly averages below give a reliable picture of what to expect.
Idaho Falls 14-day outlook: the story
The best time to visit Idaho Falls is generally May to June and September to October, when temperatures sit either side of the peak heat rather than in it. Daytime temperatures in that window sit near 71°F (21°C), with rain on about 7 days a month. For the same question asked the other way round, see where else is warm in May.
For typical conditions month by month, see the Idaho Falls climate & average temperatures guide.
Average temperatures in Idaho Falls by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 31° | 15° | 9 | 1.2 in | 6.1 h/day | 9.3 h | 28% | 77% |
| February | 36° | 19° | 9 | 1.2 in | 7.4 h/day | 10.4 h | 33% | 70% |
| March | 47° | 26° | 9 | 1.5 in | 9.1 h/day | 11.8 h | 30% | 62% |
| April | 57° | 33° | 9 | 1.3 in | 10.6 h/day | 13.4 h | 30% | 51% |
| May | 67° | 42° | 10 | 1.9 in | 12.1 h/day | 14.7 h | 32% | 49% |
| June | 80° | 52° | 5 | 0.8 in | 13.7 h/day | 15.4 h | 17% | 39% |
| July | 90° | 60° | 1 | 0.2 in | 14.2 h/day | 15.1 h | 4% | 29% |
| August | 86° | 58° | 3 | 0.5 in | 12.4 h/day | 14.0 h | 10% | 34% |
| September | 76° | 49° | 5 | 1.2 in | 11.0 h/day | 12.4 h | 15% | 42% |
| October | 59° | 37° | 7 | 1.4 in | 9.1 h/day | 10.9 h | 23% | 56% |
| November | 43° | 25° | 8 | 1.2 in | 7.1 h/day | 9.6 h | 27% | 67% |
| December | 32° | 17° | 9 | 1.4 in | 5.5 h/day | 9.0 h | 30% | 74% |
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