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Delémont, Switzerland climate
Cfb Oceanic / temperate
Delémont has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 25°C, while the coldest is January averaging around −2°C at night. Precipitation is fairly even year-round, totalling about 876 mm.
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Summers
Mild
Highs near 25°C in July.
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Winters
Cold
Lows near −2°C in January.
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Rain
Moderate rainfall
About 876 mm of rain a year.
Wettest in August
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Sky & trend
Often cloudy
Cloudy skies much of the year.
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)Delémont climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 7 | 11 | 15 | 19 | 23 | 25 | 25 | 20 | 15 | 9 | 5 |
| Avg temp (°C) | 1 | 2 | 5 | 9 | 13 | 17 | 19 | 18 | 14 | 10 | 5 | 2 |
| Avg low (°C) | −2 | −2 | 0 | 3 | 8 | 11 | 13 | 13 | 9 | 6 | 2 | −2 |
| Precipitation (mm) | 53 | 50 | 52 | 65 | 93 | 91 | 94 | 96 | 72 | 73 | 69 | 68 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 7 | 11 | 15 | 19 | 23 |
| Avg temp (°C) | 1 | 2 | 5 | 9 | 13 | 17 |
| Avg low (°C) | −2 | −2 | 0 | 3 | 8 | 11 |
| Precipitation (mm) | 53 | 50 | 52 | 65 | 93 | 91 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 25 | 20 | 15 | 9 | 5 |
| Avg temp (°C) | 19 | 18 | 14 | 10 | 5 | 2 |
| Avg low (°C) | 13 | 13 | 9 | 6 | 2 | −2 |
| Precipitation (mm) | 94 | 96 | 72 | 73 | 69 | 68 |
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 (%) | 91 | 88 | 83 | 79 | 79 | 77 | 76 | 76 | 80 | 86 | 90 | 91 |
| Wind speed (km/h) | 8.1 | 8.4 | 8.3 | 7.1 | 6.9 | 6.4 | 6.2 | 5.6 | 6.0 | 6.4 | 6.6 | 7.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 68 | 69 | 70 | 66 |
| Relative humidity (%) | 91 | 88 | 83 | 79 | 79 | 77 |
| Wind speed (km/h) | 8.1 | 8.4 | 8.3 | 7.1 | 6.9 | 6.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 60 | 62 | 70 | 75 | 74 |
| Relative humidity (%) | 76 | 76 | 80 | 86 | 90 | 91 |
| Wind speed (km/h) | 6.2 | 5.6 | 6.0 | 6.4 | 6.6 | 7.9 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from a national meteorological service, measured at Delémont, 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.