The hottest month in Newfoundland is August when the average maximum temperature is 19°, average temperature is 17° and average minimum temperature is 14°.
The coolest month in Newfoundland is February when the average maximum temperature is -0°, average temperature is -3° and average minimum temperature is -5°.
The longest days in Newfoundland are in June, with an average of 16 hours of daylight per day. December has the shortest days with an average of 8.4 hours of daylight per day.
The sunniest days in Newfoundland are in July which has the most hours of sunshine per day with an average of 7 hours of sunshine per day, making it a quite sunny month with some cloud cover. December has the least sunshine with an average of 2 hours of sunshine per day, making it not a particularly sunny month.
The ultraviolet index is the highest in June when it reaches 8.2 and lowest in December when it reaches 0.8.
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 Newfoundland are found in August when they peak at 16° and lowest in February when they dip to 0°.
The sea is best for swimming between June and December when the temperature is above 6° which is extremely cold and not suitable for swimming. Taking a dip at this temperature would risk hypothermia.
The wettest month in Newfoundland is November with 11cm of rain and January has the most days of rain with 19.2 days with some rain, a wet time to visit the beach.
The driest month in Newfoundland is April with 6.1cm of rain and September has the fewest days of rain with 12 days with some rain, a slightly wet time to visit the beach.
The most humid month in Newfoundland is August with a dew point (an indicator of humidity) of 16° which is OK for most but slightly uncomfortable for some.
The least humid month in Newfoundland is February with a dew point of -2° which is a bit dry for some.
The most windy month in Newfoundland is January when the average maximum windspeed is 49kmh and the average wind speed is 31kmh.
The least windy month in Newfoundland is July when the average maximum windspeed is 30kmh and the average wind speed is 19kmh.