Temperature
Cold by day, freezing at night.
Cold days and plenty of sun. Some snow or mixed precipitation is possible.

Cold by day, freezing at night.
Some snow or mixed precipitation is possible this month.
Plenty of sun this month.
Humidity is rarely noticeable in the cool air.
In October, afternoons feel about 36° and nights feel near 21°.
Partly cloudy skies this month.
Calm winds are typical in October.
October late afternoons are around 43°F, easing to about 38°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 25 | 11 | 1.5 | 10 | 7.1 | 76 |
| Feb | 27 | 12 | 1.7 | 11 | 8.3 | 75 |
| Mar | 35 | 19 | 2.2 | 13 | 10.0 | 71 |
| Apr | 41 | 23 | 3.2 | 15 | 11.1 | 69 |
| May | 51 | 30 | 3.8 | 17 | 12.4 | 70 |
| Jun | 63 | 38 | 3.7 | 15 | 13.4 | 65 |
| Jul | 75 | 46 | 1.5 | 9 | 14.4 | 54 |
| Aug | 73 | 44 | 1.8 | 10 | 12.8 | 52 |
| Sep | 63 | 38 | 2.1 | 9 | 11.1 | 56 |
| Oct | 47 | 27 | 2.5 | 11 | 9.1 | 67 |
| Nov | 33 | 16 | 1.7 | 10 | 7.5 | 74 |
| Dec | 25 | 10 | 1.7 | 11 | 6.5 | 77 |
Similar climates
Want a side-by-side climate view? Compare Big Sky with Breckenridge.
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: Aug 7, 2026
Data & methodology