The hottest month in Orange County is August when the average maximum temperature is 27°, average temperature is 23° and average minimum temperature is 19°.
The coolest month in Orange County is January when the average maximum temperature is 20°, average temperature is 14° and average minimum temperature is 9°.
The longest days in Orange County are in June, with an average of 14.4 hours of daylight per day. December has the shortest days with an average of 9.9 hours of daylight per day.
The sunniest days in Orange County are in July which has the most hours of sunshine per day with an average of 10.2 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 7.1 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 11.7 and lowest in December when it reaches 3.3.
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.
The warmest sea water temperatures in Orange County are found in August when they peak at 28° and lowest in March when they dip to 15°.
The sea is best for swimming between May and December when the temperature is above 21° which is comfortable for swimming though some may prefer warmer water.
The wettest month in Orange County is February with 52.8cm of rain and December has the most days of rain with 8.9 days with some rain, a slightly wet time to visit the beach.
The driest month in Orange County is August with 0.1cm of rain and the least days of rain with 0.5 days with some rain, an extremely dry time to visit the beach.
The most humid month in Orange County is August with a dew point (an indicator of humidity) of 17° which is OK for most but slightly uncomfortable for some.
The least humid month in Orange County is January with a dew point of 8° which is a bit dry for some.
The most windy month in Orange County is May when the average maximum windspeed is 23kmh and the average wind speed is 10kmh.
The least windy month in Orange County is December when the average maximum windspeed is 20kmh and the average wind speed is 6kmh.