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Dunkerque, Hauts-de-France climate
Cfb Oceanic / temperate
Dunkerque has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 72°F, while the coldest is January averaging around 35°F at night. Around 31 inches of precipitation falls each year, peaking in October (3.8 inches) and easing off in April (1.4 inches). At latitude 51°N, day length swings from 7.7 hours in midwinter to 16.3 hours at midsummer.
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)Dunkerque climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 46 | 51 | 57 | 62 | 67 | 71 | 72 | 67 | 60 | 51 | 46 |
| Avg temp (°F) | 40 | 41 | 45 | 49 | 55 | 60 | 63 | 64 | 59 | 53 | 46 | 41 |
| Avg low (°F) | 35 | 35 | 38 | 41 | 47 | 52 | 55 | 55 | 51 | 46 | 41 | 36 |
| Precipitation (in) | 2.0 | 2.0 | 1.8 | 1.4 | 2.0 | 2.4 | 2.9 | 3.0 | 3.1 | 3.8 | 3.7 | 3.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 46 | 51 | 57 | 62 | 67 |
| Avg temp (°F) | 40 | 41 | 45 | 49 | 55 | 60 |
| Avg low (°F) | 35 | 35 | 38 | 41 | 47 | 52 |
| Precipitation (in) | 2.0 | 2.0 | 1.8 | 1.4 | 2.0 | 2.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 72 | 67 | 60 | 51 | 46 |
| Avg temp (°F) | 63 | 64 | 59 | 53 | 46 | 41 |
| Avg low (°F) | 55 | 55 | 51 | 46 | 41 | 36 |
| Precipitation (in) | 2.9 | 3.0 | 3.1 | 3.8 | 3.7 | 3.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 78 | 75 | 70 | 69 | 71 | 68 | 70 | 72 | 77 | 81 | 81 |
| Relative humidity (%) | 91 | 88 | 85 | 82 | 81 | 81 | 81 | 81 | 83 | 86 | 90 | 91 |
| Wind speed (mph) | 11.1 | 10.5 | 9.5 | 8.1 | 7.9 | 7.5 | 7.4 | 7.5 | 8.3 | 9.5 | 10.0 | 10.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 78 | 75 | 70 | 69 | 71 |
| Relative humidity (%) | 91 | 88 | 85 | 82 | 81 | 81 |
| Wind speed (mph) | 11.1 | 10.5 | 9.5 | 8.1 | 7.9 | 7.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 70 | 72 | 77 | 81 | 81 |
| Relative humidity (%) | 81 | 81 | 83 | 86 | 90 | 91 |
| Wind speed (mph) | 7.4 | 7.5 | 8.3 | 9.5 | 10.0 | 10.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Koksijde, a weather station, about 20 km from the city centre. The underlying daily records come from NOAA's global station network.
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.