Temperature
Cool by day, cold at night.
57°Ftypical September high
Typical range
Cool days and plenty of sun.
Cool by day, cold at night.
Several rainy days. About 11 wet days, the lowest monthly average.
A mix of sunshine and cloud.
In September, afternoons feel about 52° and nights feel near 37°.
Partly cloudy skies this month.
Calm winds are typical in September.
September late afternoons are around 56°F, easing to about 51°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 29 | 15 | 4.8 | 13 | 6.6 | 75 |
| Feb | 32 | 17 | 3.5 | 11 | 8.1 | 74 |
| Mar | 37 | 22 | 4.2 | 12 | 9.5 | 75 |
| Apr | 43 | 26 | 4.2 | 14 | 10.8 | 76 |
| May | 52 | 34 | 5.4 | 18 | 11.6 | 78 |
| Jun | 61 | 42 | 4.5 | 15 | 12.8 | 76 |
| Jul | 64 | 44 | 3.5 | 11 | 13.3 | 72 |
| Aug | 64 | 44 | 3.5 | 11 | 12.1 | 73 |
| Sep | 57 | 38 | 3.4 | 11 | 10.3 | 78 |
| Oct | 50 | 33 | 4.5 | 12 | 8.5 | 79 |
| Nov | 37 | 22 | 5.8 | 13 | 6.8 | 80 |
| Dec | 30 | 16 | 5.4 | 13 | 6.2 | 77 |
Similar climates
Want a side-by-side climate view? Compare Alpe d'Huez with Arosa.
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