Temperature
Cool by day, cold at night.
56°Ftypical September high
Typical range
September climate
September in Arosa
Switzerland · Europe
Cool days and some sun. Some snow or mixed precipitation is possible.
One of the best months here
Mid to late
Daytime high
56°F
Lows around 40°F
Precipitation
14 days/mo
Sun
9 h/day
Air feel
Very dry
When to visit
Month-by-month fit
Best
Precipitation
Some snow or mixed precipitation is possible this month.
47%wet-day frequency
Precip amountWet-day chanceSnowfall
Sunshine
Wintry precipitation and cloud limit sunshine.
9.2 hSeptember sunshine
Heat & humidity by month
Very drySeptember Heat feel
Easy airWarm air
Hourly temperature pattern
In September, afternoons feel about 52° and nights feel near 38°.
FrigidFreezingVery coldColdCoolNight hours
Clear sky
Mostly cloudy skies this month.
30%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 55°F, easing to about 50°F in early evening.
Avg temp Typical range
Morning46°F
Rain24%
Cloud68%
Humid airLow
Sun intensityLow
Midday54°F
Rain33%
Cloud61%
Humid airLow
Sun intensityModerate
Late afternoon55°F
Rain37%
Cloud65%
Humid airLow
Sun intensityModerate
Early evening50°F
Rain29%
Cloud61%
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 | 27 | 12 | 3.1 | 13 | 6.5 | 76 |
| Feb | 31 | 15 | 2.7 | 12 | 7.5 | 74 |
| Mar | 37 | 21 | 3.4 | 14 | 9.0 | 73 |
| Apr | 44 | 28 | 4.0 | 15 | 10.3 | 73 |
| May | 52 | 36 | 5.9 | 20 | 10.6 | 77 |
| Jun | 61 | 44 | 6.4 | 20 | 11.2 | 77 |
| Jul | 63 | 46 | 6.5 | 19 | 11.7 | 78 |
| Aug | 63 | 46 | 6.5 | 18 | 10.4 | 80 |
| Sep | 56 | 40 | 4.5 | 14 | 9.2 | 81 |
| Oct | 49 | 33 | 4.4 | 13 | 7.8 | 81 |
| Nov | 37 | 22 | 4.6 | 14 | 6.2 | 80 |
| Dec | 29 | 14 | 3.4 | 13 | 5.6 | 78 |
Similar climates
Similar
Similar travel styleBad GasteinAustriaSimilar travel styleDavosSwitzerlandSimilar travel styleAspenUnited StatesSimilar travel styleBanskoBulgaria
Want a side-by-side climate view? Compare Arosa with Bad Gastein.
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