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Solothurn, Switzerland climate
Cfb Oceanic / temperate
Solothurn has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 77°F, while the coldest is January averaging around 27°F at night. Around 40 inches of precipitation falls each year, peaking in August (4.5 inches) and easing off in February (2.2 inches).
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)Solothurn climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 38 | 41 | 51 | 59 | 66 | 73 | 77 | 76 | 67 | 57 | 46 | 38 |
| Avg temp (°F) | 33 | 34 | 41 | 48 | 56 | 62 | 66 | 65 | 57 | 49 | 40 | 34 |
| Avg low (°F) | 27 | 27 | 33 | 38 | 46 | 52 | 55 | 55 | 49 | 42 | 34 | 29 |
| Precipitation (in) | 2.6 | 2.2 | 2.5 | 3.0 | 4.1 | 4.2 | 4.2 | 4.5 | 3.3 | 3.4 | 3.0 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 38 | 41 | 51 | 59 | 66 | 73 |
| Avg temp (°F) | 33 | 34 | 41 | 48 | 56 | 62 |
| Avg low (°F) | 27 | 27 | 33 | 38 | 46 | 52 |
| Precipitation (in) | 2.6 | 2.2 | 2.5 | 3.0 | 4.1 | 4.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 77 | 76 | 67 | 57 | 46 | 38 |
| Avg temp (°F) | 66 | 65 | 57 | 49 | 40 | 34 |
| Avg low (°F) | 55 | 55 | 49 | 42 | 34 | 29 |
| Precipitation (in) | 4.2 | 4.5 | 3.3 | 3.4 | 3.0 | 3.3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 68 | 69 | 70 | 66 | 61 | 60 | 62 | 70 | 75 | 74 |
| Relative humidity (%) | 84 | 83 | 80 | 78 | 78 | 77 | 76 | 75 | 78 | 82 | 85 | 84 |
| Wind speed (mph) | 4.3 | 4.6 | 4.7 | 4.2 | 4.2 | 4.0 | 3.8 | 3.5 | 3.6 | 3.6 | 3.6 | 4.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 68 | 69 | 70 | 66 |
| Relative humidity (%) | 84 | 83 | 80 | 78 | 78 | 77 |
| Wind speed (mph) | 4.3 | 4.6 | 4.7 | 4.2 | 4.2 | 4.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 60 | 62 | 70 | 75 | 74 |
| Relative humidity (%) | 76 | 75 | 78 | 82 | 85 | 84 |
| Wind speed (mph) | 3.8 | 3.5 | 3.6 | 3.6 | 3.6 | 4.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Koppigen, about 11 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.