Temperature
Cool by day, cold at night.
55°Ftypical September high
Typical range
September climate
September in St. Moritz
Switzerland · Europe
Cool days and some sun.
One of the best months here
Early to mid
Daytime high
55°F
Lows around 40°F
Rain
Frequent rain
Sun
9.5 h/day
Air feel
Very dry
When to visit
Month-by-month fit
Best
Precipitation
Rain is frequent. About 14 wet days this month.
47%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
9.4 hSeptember sunshine
Heat & humidity by month
Humidity is rarely noticeable in the cool air.
Very drySeptember Heat feel
Easy airWarm air
Hourly temperature pattern
In September, afternoons feel about 50° and nights feel near 38°.
FrigidFreezingVery coldColdCoolNight hours
Clear sky
Mostly cloudy skies this month.
26%September Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in September.
3 mphSeptember Calm
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 54°F, easing to about 50°F in early evening.
Avg temp Typical range
Morning45°F
Rain23%
Cloud74%
Humid airLow
Sun intensityLow
Midday53°F
Rain38%
Cloud64%
Humid airLow
Sun intensityModerate
Late afternoon54°F
Rain40%
Cloud69%
Humid airLow
Sun intensityModerate
Early evening49°F
Rain26%
Cloud62%
Humid airLow
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 25 | 11 | 2.8 | 11 | 7.0 | 78 |
| Feb | 29 | 13 | 2.4 | 10 | 8.0 | 76 |
| Mar | 35 | 20 | 3.0 | 12 | 9.5 | 76 |
| Apr | 41 | 28 | 4.1 | 15 | 10.6 | 77 |
| May | 50 | 36 | 5.6 | 19 | 10.8 | 81 |
| Jun | 60 | 43 | 6.4 | 20 | 11.7 | 78 |
| Jul | 63 | 46 | 6.4 | 20 | 12.2 | 79 |
| Aug | 62 | 46 | 6.4 | 18 | 10.7 | 81 |
| Sep | 55 | 40 | 4.3 | 14 | 9.4 | 83 |
| Oct | 47 | 33 | 5.0 | 13 | 7.8 | 84 |
| Nov | 35 | 22 | 5.5 | 14 | 6.5 | 84 |
| Dec | 27 | 13 | 3.3 | 12 | 6.1 | 80 |
Similar climates
Similar
Similar travel styleAlpe d'HuezFranceSimilar travel styleArosaSwitzerlandSimilar travel styleCrans-MontanaSwitzerlandSimilar travel styleDavosSwitzerland
Want a side-by-side climate view? Compare St. Moritz with Alpe d'Huez.
Climate data notePlanning guidance, not a forecast
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