The hottest month in Dover is July when the average maximum temperature is 20°, average temperature is 18° and average minimum temperature is 17°.
The coolest month in Dover is February when the average maximum temperature is 8°, average temperature is 6° and average minimum temperature is 4°.
The longest days in Dover are in June, with an average of 16.5 hours of daylight per day. December has the shortest days with an average of 7.9 hours of daylight per day.
The sunniest days in Dover are in June which has the most hours of sunshine per day with an average of 7.6 hours of sunshine per day, making it a quite sunny month with some cloud cover. December has the least sunshine with an average of 1.3 hours of sunshine per day, making it not a particularly sunny month.
The ultraviolet index is the highest in June when it reaches 7.6 and lowest in December when it reaches 0.6.
An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Dover are found in August when they peak at 17° and lowest in March when they dip to 6°.
The sea is best for swimming between June and December when the temperature is above 12° which is very cold and bracing, it's not recommended you swim with out a full wet suit.
The most humid month in Dover is July with a dew point (an indicator of humidity) of 15° which is comfortable for everyone.
The least humid month in Dover is February with a dew point of 5° which is a bit dry for some.
The most windy month in Dover is January when the average maximum windspeed is 35kmh and the average wind speed is 25kmh.
The least windy month in Dover is June when the average maximum windspeed is 32kmh and the average wind speed is 22kmh.