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Arosa, Switzerland climate
Dfc Subarctic
Arosa has a seasonal cold-temperate climate (Subarctic, Köppen Dfc). The hottest month is August with an average daily high near 16°C, while the coldest is February averaging around −8°C at night. Around 1179 mm of precipitation falls each year, peaking in August (158 mm) and easing off in February (65 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Arosa climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −1 | 0 | 2 | 5 | 10 | 14 | 16 | 16 | 12 | 9 | 3 | 0 |
| Avg temp (°C) | −3 | −4 | −1 | 2 | 6 | 10 | 12 | 12 | 8 | 5 | 1 | −3 |
| Avg low (°C) | −7 | −8 | −5 | −2 | 3 | 6 | 8 | 8 | 5 | 2 | −3 | −6 |
| Precipitation (mm) | 77 | 65 | 73 | 77 | 97 | 132 | 136 | 158 | 104 | 90 | 90 | 80 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −1 | 0 | 2 | 5 | 10 | 14 |
| Avg temp (°C) | −3 | −4 | −1 | 2 | 6 | 10 |
| Avg low (°C) | −7 | −8 | −5 | −2 | 3 | 6 |
| Precipitation (mm) | 77 | 65 | 73 | 77 | 97 | 132 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 16 | 16 | 12 | 9 | 3 | 0 |
| Avg temp (°C) | 12 | 12 | 8 | 5 | 1 | −3 |
| Avg low (°C) | 8 | 8 | 5 | 2 | −3 | −6 |
| Precipitation (mm) | 136 | 158 | 104 | 90 | 90 | 80 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 70 | 72 | 75 | 75 | 69 | 62 | 61 | 63 | 65 | 70 | 70 |
| Relative humidity (%) | 88 | 89 | 87 | 80 | 79 | 79 | 80 | 81 | 83 | 84 | 87 | 88 |
| Wind speed (mph) | 1.8 | 1.7 | 1.4 | 1.2 | 1.0 | 0.8 | 0.9 | 0.9 | 0.9 | 1.0 | 1.1 | 1.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 70 | 72 | 75 | 75 | 69 |
| Relative humidity (%) | 88 | 89 | 87 | 80 | 79 | 79 |
| Wind speed (mph) | 1.8 | 1.7 | 1.4 | 1.2 | 1.0 | 0.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 61 | 63 | 65 | 70 | 70 |
| Relative humidity (%) | 80 | 81 | 83 | 84 | 87 | 88 |
| Wind speed (mph) | 0.9 | 0.9 | 0.9 | 1.0 | 1.1 | 1.5 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Arosa, about 2 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.