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Dinan, Brittany climate
Cfb Oceanic / temperate
Dinan 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 39°F at night. Around 23 inches of precipitation falls each year, peaking in November (2.8 inches) and easing off in July (1.3 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)Dinan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 50 | 54 | 58 | 63 | 69 | 72 | 72 | 68 | 62 | 54 | 49 |
| Avg temp (°F) | 44 | 44 | 47 | 50 | 56 | 61 | 64 | 64 | 61 | 55 | 49 | 44 |
| Avg low (°F) | 39 | 38 | 41 | 43 | 48 | 53 | 56 | 56 | 53 | 49 | 43 | 39 |
| Precipitation (in) | 1.9 | 1.9 | 1.5 | 1.6 | 1.9 | 1.6 | 1.3 | 1.8 | 1.6 | 2.3 | 2.8 | 2.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 50 | 54 | 58 | 63 | 69 |
| Avg temp (°F) | 44 | 44 | 47 | 50 | 56 | 61 |
| Avg low (°F) | 39 | 38 | 41 | 43 | 48 | 53 |
| Precipitation (in) | 1.9 | 1.9 | 1.5 | 1.6 | 1.9 | 1.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 72 | 72 | 68 | 62 | 54 | 49 |
| Avg temp (°F) | 64 | 64 | 61 | 55 | 49 | 44 |
| Avg low (°F) | 56 | 56 | 53 | 49 | 43 | 39 |
| Precipitation (in) | 1.3 | 1.8 | 1.6 | 2.3 | 2.8 | 2.6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 72 | 69 | 66 | 66 | 64 | 62 | 62 | 60 | 68 | 71 | 71 |
| Relative humidity (%) | 90 | 87 | 84 | 81 | 80 | 79 | 78 | 78 | 80 | 85 | 89 | 91 |
| Wind speed (mph) | 9.7 | 9.2 | 8.6 | 7.9 | 7.5 | 7.1 | 7.0 | 6.8 | 7.4 | 8.4 | 9.0 | 9.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 72 | 69 | 66 | 66 | 64 |
| Relative humidity (%) | 90 | 87 | 84 | 81 | 80 | 79 |
| Wind speed (mph) | 9.7 | 9.2 | 8.6 | 7.9 | 7.5 | 7.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 62 | 60 | 68 | 71 | 71 |
| Relative humidity (%) | 78 | 78 | 80 | 85 | 89 | 91 |
| Wind speed (mph) | 7.0 | 6.8 | 7.4 | 8.4 | 9.0 | 9.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Dinard Pleurtuit Saint Malo, a weather station, about 15 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.