Idaho weather in December
One place stands in for Idaho here — these are Boise's numbers, not a statewide average.
Based on 1 weather station, in Boise. One station — Boise sits in the state’s warm southwestern valley, so the mountain towns and the panhandle run colder and snowier than these rows.
Boise & the Treasure Valley
Highs near 39°, nights around 25°, and 5.6 in of snow in a typical December.
| Place | Highs / lows | Wet days | Snow | The short version |
|---|---|---|---|---|
| Boise | 39° / 25° | 6 | 5.6 in | Low gray ceiling, occasional snow, Bogus lit up nightly. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.