The hottest month in Oceanside is September when the average maximum temperature is 26°, average temperature is 20° and average minimum temperature is 15°.
The coolest month in Oceanside is January when the average maximum temperature is 19°, average temperature is 12° and average minimum temperature is 5°.
The longest days in Oceanside are in June, with an average of 14.3 hours of daylight per day. December has the shortest days with an average of 10 hours of daylight per day.
The sunniest days in Oceanside 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 11.9 and lowest in December when it reaches 3.5.
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 Oceanside are found in August when they peak at 28° and lowest in January 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 Oceanside is February with 68.2cm of rain and the most days of rain with 10.3 days with some rain, a wet time to visit the beach.
The driest month in Oceanside is July with 0.4cm of rain and August has the fewest days of rain with 0.7 days with some rain, an extremely dry time to visit the beach.
The most humid month in Oceanside 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 Oceanside is January with a dew point of 9° which is a bit dry for some.
The most windy month in Oceanside is May when the average maximum windspeed is 23kmh and the average wind speed is 7kmh.
The least windy month in Oceanside is January when the average maximum windspeed is 20kmh and the average wind speed is 5kmh.
