Annual average weather for Cape Hatteras, Cape Hatteras Island, United States

Annual Temperature for Cape Hatteras

The hottest month in Cape Hatteras is August when the average maximum temperature is 30°, average temperature is 27° and average minimum temperature is 23°.

The coolest month in Cape Hatteras is January when the average maximum temperature is 12°, average temperature is and average minimum temperature is .

Annual Sunshine for Cape Hatteras

The longest days in Cape Hatteras are in June, with an average of 14.5 hours of daylight per day. December has the shortest days with an average of 9.8 hours of daylight per day.

The sunniest days in Cape Hatteras are in July which has the most hours of sunshine per day with an average of 10.4 hours of sunshine per day, making it a very sunny and pleasant month with long bright days. January has the least sunshine with an average of 7.6 hours of sunshine per day, making it a quite sunny month with some cloud cover.

The ultraviolet index is the highest in July when it reaches 10.8 and lowest in December when it reaches 2.6.

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.

Annual Sea Temperature for Cape Hatteras

The warmest sea water temperatures in Cape Hatteras are found in August when they peak at 27° and lowest in April when they dip to 18°.

The sea is best for swimming between June and December when the temperature is above 23° which is warm and pleasant for relaxing and swimming for long periods.

Annual Rainfall for Cape Hatteras

The wettest month in Cape Hatteras is September with 24.2cm of rain and August has the most days of rain with 14.8 days with some rain, a slightly wet time to visit the beach.

The driest month in Cape Hatteras is June with 9.1cm of rain and May has the fewest days of rain with 10.3 days with some rain, a slightly wet time to visit the beach.

Annual Humidity for Cape Hatteras

The most humid month in Cape Hatteras is July with a dew point (an indicator of humidity) of 24° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.

The least humid month in Cape Hatteras is January with a dew point of which is a bit dry for some.

Annual Wind Speed for Cape Hatteras

The most windy month in Cape Hatteras is February when the average maximum windspeed is 29kmh and the average wind speed is 15kmh.

The least windy month in Cape Hatteras is August when the average maximum windspeed is 25kmh and the average wind speed is 12kmh.

Monthly Averages

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