Temperature
Cool by day, brisk at night.
63°Ftypical September high
Typical range
Cool days and some sun.

Cool by day, brisk at night.
Rain is frequent. About 17 wet days, fewer than in most months.
Cloudier spells limit sunshine.
In September, afternoons feel about 57° and nights feel near 50°.
Overcast skies this month.
Calm winds are typical in September.
September late afternoons are around 61°F, easing to about 58°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 44 | 36 | 6.5 | 18 | 2.2 | 91 |
| Feb | 47 | 39 | 8.5 | 20 | 4.2 | 89 |
| Mar | 51 | 39 | 5.1 | 17 | 6.0 | 85 |
| Apr | 55 | 40 | 3.6 | 14 | 8.5 | 80 |
| May | 61 | 47 | 4.4 | 16 | 9.8 | 79 |
| Jun | 65 | 52 | 4.9 | 18 | 9.2 | 81 |
| Jul | 67 | 55 | 4.9 | 19 | 8.7 | 84 |
| Aug | 66 | 55 | 6.1 | 20 | 7.9 | 86 |
| Sep | 63 | 51 | 5.2 | 17 | 6.2 | 87 |
| Oct | 56 | 48 | 8.6 | 23 | 4.5 | 89 |
| Nov | 50 | 42 | 6.6 | 18 | 3.0 | 91 |
| Dec | 46 | 39 | 8.7 | 20 | 1.8 | 92 |
Similar climates
Want a side-by-side climate view? Compare Fort William with El Chalten.
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