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Sitten, Switzerland climate
Cfb Oceanic / temperate
Sitten has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 27°C, while the coldest is January averaging around −3°C at night. Around 583 mm of precipitation falls each year, peaking in December (68 mm) and easing off in April (34 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)Sitten climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 8 | 14 | 18 | 22 | 25 | 27 | 27 | 22 | 17 | 10 | 5 |
| Avg temp (°C) | 1 | 2 | 7 | 11 | 15 | 19 | 21 | 20 | 16 | 11 | 5 | 1 |
| Avg low (°C) | −3 | −2 | 2 | 5 | 9 | 13 | 15 | 14 | 10 | 6 | 1 | −2 |
| Precipitation (mm) | 52 | 40 | 37 | 34 | 52 | 48 | 62 | 60 | 38 | 43 | 50 | 68 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 8 | 14 | 18 | 22 | 25 |
| Avg temp (°C) | 1 | 2 | 7 | 11 | 15 | 19 |
| Avg low (°C) | −3 | −2 | 2 | 5 | 9 | 13 |
| Precipitation (mm) | 52 | 40 | 37 | 34 | 52 | 48 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 22 | 17 | 10 | 5 |
| Avg temp (°C) | 21 | 20 | 16 | 11 | 5 | 1 |
| Avg low (°C) | 15 | 14 | 10 | 6 | 1 | −2 |
| Precipitation (mm) | 62 | 60 | 38 | 43 | 50 | 68 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 69 | 72 | 65 | 59 | 59 | 61 | 66 | 71 | 71 |
| Relative humidity (%) | 83 | 83 | 86 | 82 | 78 | 75 | 74 | 75 | 78 | 80 | 85 | 83 |
| Wind speed (mph) | 3.6 | 3.7 | 3.8 | 3.8 | 3.6 | 3.4 | 3.4 | 3.1 | 3.1 | 3.2 | 3.4 | 3.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 69 | 72 | 65 |
| Relative humidity (%) | 83 | 83 | 86 | 82 | 78 | 75 |
| Wind speed (mph) | 3.6 | 3.7 | 3.8 | 3.8 | 3.6 | 3.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 59 | 61 | 66 | 71 | 71 |
| Relative humidity (%) | 74 | 75 | 78 | 80 | 85 | 83 |
| Wind speed (mph) | 3.4 | 3.1 | 3.1 | 3.2 | 3.4 | 3.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Sion, 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.