Temperature
Cold by day, freezing at night.
Not the best time: Cold conditions during longer outdoor plans and some snow or mixed precipitation are the main limitations.
Cold by day, freezing at night.
Some snow or mixed precipitation is possible this month.
Wintry precipitation and cloud limit sunshine.
Humidity is rarely noticeable in the cool air.
In December, afternoons feel about 8° and nights feel near 5°.
Mostly cloudy skies this month.
Calm winds are typical in December.
December late afternoons are around 18°F, and early evening stays near 18°F.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 22 | 11 | 2.7 | 14 | 6.2 | 80 |
| Feb | 25 | 13 | 2.6 | 13 | 7.7 | 78 |
| Mar | 33 | 20 | 2.9 | 15 | 9.5 | 73 |
| Apr | 40 | 24 | 3.0 | 15 | 10.9 | 71 |
| May | 47 | 29 | 2.8 | 14 | 12.2 | 72 |
| Jun | 60 | 37 | 2.4 | 12 | 13.2 | 65 |
| Jul | 71 | 45 | 1.2 | 8 | 14.1 | 54 |
| Aug | 70 | 46 | 1.6 | 9 | 12.7 | 55 |
| Sep | 61 | 40 | 2.1 | 10 | 10.9 | 61 |
| Oct | 45 | 30 | 2.7 | 12 | 8.8 | 72 |
| Nov | 32 | 20 | 2.7 | 12 | 7.0 | 81 |
| Dec | 22 | 12 | 3.1 | 14 | 5.7 | 82 |
Similar climates
Want a side-by-side climate view? Compare Yellowstone National Park with Glacier National Park.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology