Weather in Hawaii Island, United States in May

So you're interested in going to Hawaii Island, United States in May

May is a hot and rainy time for sunbathing in Hawaii Island. May is an excellent month for swimming in Hawaii Island with very warm sea temperatures. Consider visiting Hawaii Island in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for May.

Temperature in Hawaii Island in May

The average maximum temperature in Hawaii Island in May is 28°. The average maximum temperature is 27° in the previous month and 28° in the next month.

The average temperature in Hawaii Island in May is 25°. The average temperature ranges is 24° in the previous month and 25° in the next month.

The average minimum temperature in Hawaii Island in May is 22°. The minimum temperature is 21° in the previous month and 22° in the next month.

Sunshine in Hawaii Island in May

The average day light hours per day in Hawaii Island in May are 13.1 and there are 7.2 hours of sunshine per day on average during May making it a quite sunny month with some cloud cover.

The ultraviolet index in Hawaii Island in May is typically 12.9 during May. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. 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.

Sea Temperature in Hawaii Island in May

The average sea water temperature in Hawaii Island in May is 25.8° which is warm and pleasant for relaxing and swimming for long periods.

Rainfall in Hawaii Island in May

The average total rainfall in Hawaii Island in May is 62.8cm and on average there are 15 rainy days in May making it a wet time to visit the beach.

Humidity in Hawaii Island in May

The maximum dew point (an indicator of humidity) in Hawaii Island in May is 20° which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 19° in the previous month and 21° in the next month.

The average maximum relative humidity in Hawaii Island in May is typically 82.9%. The maximum relative humidity is 81.6% in the previous month and 81.9% in the next month.

The average relative humidity in Hawaii Island in May is typically 70%. The average relative humidity is 69% in the previous month and 69.3% in the next month.

Wind Speed in Hawaii Island in May

The average maximum wind speed in Hawaii Island in May is typically 23kmh. The average maximum wind speed is 24kmh in the previous month and 23kmh in the next month.

The average wind speed in Hawaii Island in May is typically 11kmh. The average wind speed is 11kmh in the previous month and 10kmh in the next month.

The average wind direction in Hawaii Island in May is from the South-Southwest.

Monthly Averages

Suggested Beaches in May

Book Accomodation Deals