Temperature
Cold by day, freezing at night.
Alamosa is usually most comfortable in September and October. Typical daytime highs range from 37–84°F across the year. Most months see little rain.

Cold by day, freezing at night.
Some precipitation is expected this month.
Plenty of sun this month.
Humidity is rarely noticeable in the cool air.
In November, afternoons feel about 37° and nights feel near 19°.
Mostly clear skies this month.
Calm winds are typical in November.
November late afternoons are around 45°F, easing to about 36°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 37 | 10 | 0.6 | 4 | 9.0 | 62 |
| Feb | 42 | 16 | 0.6 | 4 | 9.9 | 57 |
| Mar | 52 | 25 | 0.8 | 5 | 11.0 | 49 |
| Apr | 60 | 31 | 1.1 | 6 | 11.8 | 43 |
| May | 69 | 39 | 1.2 | 7 | 13.1 | 41 |
| Jun | 80 | 48 | 0.7 | 6 | 13.5 | 37 |
| Jul | 84 | 53 | 1.2 | 9 | 13.1 | 49 |
| Aug | 81 | 52 | 1.2 | 8 | 12.3 | 52 |
| Sep | 75 | 45 | 1.0 | 5 | 11.5 | 49 |
| Oct | 63 | 34 | 0.9 | 4 | 10.3 | 49 |
| Nov | 49 | 24 | 0.5 | 3 | 9.4 | 50 |
| Dec | 38 | 13 | 0.6 | 4 | 8.7 | 59 |
Similar climates
Want a side-by-side climate view? Compare Alamosa with Arco.
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: Jul 31, 2026
Data & methodology