December is a hot and rainy time for sunbathing in Oahu Island. December is a good month for swimming in Oahu Island with warm sea temperatures. Consider visiting Oahu Island in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for December.
The average maximum temperature in Oahu Island in December is 26°. The average maximum temperature is 27° in the previous month and 26° in the next month.
The average temperature in Oahu Island in December is 23°. The average temperature ranges is 24° in the previous month and 22° in the next month.
The average minimum temperature in Oahu Island in December is 20°. The minimum temperature is 21° in the previous month and 19° in the next month.
The average day light hours per day in Oahu Island in December are 10.8 and there are 5.1 hours of sunshine per day on average during December making it a sunny month that is overcast at times.
The ultraviolet index in Oahu Island in December is typically 6.4 during December. An ultraviolet index reading of 6 to 7 indicates a high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 20 minutes. Protection against skin and eye damage is needed. Tanning will be safest before 10am and after 4pm. 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 average sea water temperature in Oahu Island in December is 24.9° which is warm and pleasant for relaxing and swimming for long periods.
The average total rainfall in Oahu Island in December is 27.4cm and on average there are 16.4 rainy days in December making it a wet time to visit the beach.
The maximum dew point (an indicator of humidity) in Oahu Island in December is 20° which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 20° in the previous month and 19° in the next month.
The average maximum relative humidity in Oahu Island in December is typically 88.1%. The maximum relative humidity is 87.1% in the previous month and 87.8% in the next month.
The average relative humidity in Oahu Island in December is typically 75.5%. The average relative humidity is 74.4% in the previous month and 74.8% in the next month.
The average maximum wind speed in Oahu Island in December is typically 26kmh. The average maximum wind speed is 26kmh in the previous month and 27kmh in the next month.
The average wind speed in Oahu Island in December is typically 13kmh. The average wind speed is 14kmh in the previous month and 14kmh in the next month.
The average wind direction in Oahu Island in December is from the East-Northeast.
