Winter temperatures · Idaho
How cold does Boise get in winter?
In a typical winter, December to February, Boise averages highs around 41°F and lows around 27°F.
About 16 days a year never get above freezing. About 4 nights a year drop to 10°F or colder, and about one goes below zero. That makes it the 63rd coldest winter of the 129 US cities we track.
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The coldest low in the forecast for the next 48 hours is about 43°F.
Boise averages winter highs around 41°F, which feels positively civil next to the mountains looming over it.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
More about the weather here
Winter at a glance
| Average winter high | 41°F |
|---|---|
| Average winter low | 27°F |
| Days a year that stay below freezing | 16 |
| Nights a year at 32°F or colder | 108 |
| Nights a year at 10°F or colder | 4 |
| Nights a year below zero | 1 |
| Average summer high, for comparison | 88°F |
Winter here is December to February. Counts are averages a year.
Cities with about the same winter
- Cincinnati, Ohio: highs around 42°F, lows around 26°F
- Salt Lake City, Utah: highs around 41°F, lows around 26°F
- Harrisburg, Pennsylvania: highs around 41°F, lows around 25°F
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00024131.