The hottest month in Redondo Beach is September when the average maximum temperature is 26°, average temperature is 22° and average minimum temperature is 18°.
The coolest month in Redondo Beach is January when the average maximum temperature is 20°, average temperature is 15° and average minimum temperature is 10°.
The longest days in Redondo Beach 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 Redondo Beach are in July which has the most hours of sunshine per day with an average of 10.9 hours of sunshine per day, making it a very sunny and pleasant month with long bright days. December has the least sunshine with an average of 6.8 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 Redondo Beach are found in September when they peak at 21° and lowest in January when they dip to 15°.
The sea is best for swimming between May and December when the temperature is above 17° which is cool for swimming, shorty wetsuit may help you extend your time in the water.
The most humid month in Redondo Beach is August with a dew point (an indicator of humidity) of 18° which is OK for most but slightly uncomfortable for some.
The least humid month in Redondo Beach is January with a dew point of 9° which is a bit dry for some.
The most windy month in Redondo Beach is August when the average maximum windspeed is 29kmh and the average wind speed is 14kmh.
The least windy month in Redondo Beach is January when the average maximum windspeed is 19kmh and the average wind speed is 9kmh.