The hottest month in Oregon is August when the average maximum temperature is 19°, average temperature is 15° and average minimum temperature is 12°.
The coolest month in Oregon is December when the average maximum temperature is 10°, average temperature is 6° and average minimum temperature is 3°.
The longest days in Oregon are in June, with an average of 15.6 hours of daylight per day. December has the shortest days with an average of 8.8 hours of daylight per day.
The sunniest days in Oregon are in July which has the most hours of sunshine per day with an average of 9.6 hours of sunshine per day, making it a sunny month with few clouds. December has the least sunshine with an average of 2.5 hours of sunshine per day, making it not a particularly sunny month.
The ultraviolet index is the highest in June when it reaches 9 and lowest in December when it reaches 1.2.
An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. 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 Oregon are found in August when they peak at 15° and lowest in February when they dip to 8°.
The sea is best for swimming between June and December when the temperature is above 11° which is very cold and bracing, it's not recommended you swim with out a full wet suit.
The wettest month in Oregon is November with 22cm of rain and March has the most days of rain with 23.7 days with some rain, a very wet time to visit the beach.
The driest month in Oregon is July with 1.7cm of rain and the least days of rain with 7.9 days with some rain, a dry time to visit the beach.
The most humid month in Oregon is August with a dew point (an indicator of humidity) of 14° which is comfortable for everyone.
The least humid month in Oregon is December with a dew point of 6° which is a bit dry for some.
The most windy month in Oregon is December when the average maximum windspeed is 31kmh and the average wind speed is 14kmh.
The least windy month in Oregon is September when the average maximum windspeed is 25kmh and the average wind speed is 9kmh.
