August weather forecastSan Clemente, CA
August
Weather in August
The last month of the summer, August, is another warm month in San Clemente, California, with an average temperature varying between 77.2°F (25.1°C) and 63.5°F (17.5°C).Temperature
In the transition from July to August, San Clemente reports an average high-temperature of a still moderately hot 77.2°F (25.1°C), indicating a close resemblance to the prior month. During the month of August, an average low-temperature of 63.5°F (17.5°C) is recorded.Humidity
In San Clemente, the average relative humidity in August is 70%.Rainfall
In San Clemente, in August, during 2.8 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. In San Clemente, during the entire year, the rain falls for 51.1 days and collects up to 3.66" (93mm) of precipitation.Ocean temperature
With an average ocean temperature of 68.2°F (20.1°C), August is the month with the warmest seawater.Note: Swimming in 68.2°F (20.1°C) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 69.8°F (21°C).
Daylight
In San Clemente, the average length of the day in August is 13h and 21min.On the first day of August, sunrise is at 6:03 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:16 pm PDT.
Sunshine
The months with the most sunshine are July and August, with an average of 11.8h of sunshine.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 6 during August translates into these guidelines:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
San Clemente, CA
- Average high temperature in August: 77.2°F
The warmest month (with the highest average high temperature) is September (77.4°F).
The month with the lowest average high temperature is December (62.6°F).
- Average low temperature in August: 63.5°F
The months with the highest average low temperature are August and September (63.5°F).
The coldest month (with the lowest average low temperature) is February (49.6°F).
Average pressure in August
San Clemente, CA
- Average pressure in August: 29.89"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in August
San Clemente, CA
- Average wind speed in August: 4.9mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (4.9mph).
Average humidity in August
San Clemente, CA
- Average humidity in August: 70%
The month with the highest relative humidity is June (75%).
The month with the lowest relative humidity is November (60%).
Average rainfall in August
San Clemente, CA
- Average rainfall in August: 0.2"
The wettest month (with the highest rainfall) is December (0.71").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in August
San Clemente, CA
- Average rainfall days in August: 2.8 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.4 days).
Average sea temperature in August
San Clemente, CA
- Average sea temperature in August: 68.3°F
The best month for swimming (with the highest average sea temperature) is August (68.3°F).
The coldest months (with the lowest average sea temperature) are January and February (58.9°F).
Average daylight in August /
Average sunshine in August
San Clemente, CA
- Average daylight in August: 13h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in August: 11h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in August
San Clemente, CA
- Average sunshine days in August: 25.3 days
The month with the most sunshine days is October (26 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in August
San Clemente, CA
- Average UV index in August: 6
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in August
San Clemente, CA
- Average cloud cover in August: 11
The months with the most cloud cover are March and May (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in August
San Clemente, CA
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
