August weather forecastAlameda, CA
August
Weather in August
August, the last month of the summer in Alameda, is another warm month, with an average temperature varying between 75.6°F (24.2°C) and 56.1°F (13.4°C).Temperature
Alameda measures an average high-temperature of a still moderately hot 75.6°F (24.2°C) in August, nearly consistent with the preceding month. Alameda's nights in August experience an average temperature drop to a moderate 56.1°F (13.4°C).Humidity
In August, the average relative humidity is 70%.Rainfall
In Alameda, in August, it is raining for 1.3 days, with typically 0.08" (2mm) of accumulated precipitation. Throughout the year, there are 67.2 rainfall days, and 6.1" (155mm) of precipitation is accumulated.Ocean temperature
In August, the average ocean temperature is 56.7°F (13.7°C).Note: Dipping into 56.7°F (13.7°C) below 50°F (10°C) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 55.4°F (13°C) can be jarring.
Daylight
The average length of the day in August is 13h and 34min.On the first day of the month, sunrise is at 6:13 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:38 am and sunset at 7:39 pm PDT.
Sunshine
The average sunshine in August is 11.9h.UV index
April through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 5 in August, converts into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Alameda, CA
- Average high temperature in August: 75.6°F
The warmest month (with the highest average high temperature) is September (75.9°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in August: 56.1°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is January (45°F).
Average pressure in August
Alameda, CA
- Average pressure in August: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in August
Alameda, CA
- Average wind speed in August: 5.8mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest months (with the lowest average wind speed) are October and November (5.2mph).
Average humidity in August
Alameda, CA
- Average humidity in August: 70%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (65%).
Average rainfall in August
Alameda, CA
- Average rainfall in August: 0.08"
The wettest month (with the highest rainfall) is February (1.18").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in August
Alameda, CA
- Average rainfall days in August: 1.3 days
The month with the highest number of rainy days is March (11.4 days).
The month with the least rainy days is August (1.3 days).
Average sea temperature in August
Alameda, CA
- Average sea temperature in August: 56.7°F
The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).
Average daylight in August /
Average sunshine in August
Alameda, CA
- Average daylight in August: 13h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in August: 11h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in August
Alameda, CA
- Average sunshine days in August: 23.8 days
The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in August
Alameda, CA
- Average UV index in August: 5
The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in August
Alameda, CA
- Average cloud cover in August: 11
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in August
Alameda, 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).
