August weather forecastSouth San Francisco, CA
August weather forecast for South San Francisco, California: August, the last month of the summer in South San Francisco, is also an agreeable month, with an average temperature ranging between min 56.5°F (13.6°C) and max 69.1°F (20.6°C). How many days does it rain in August in South San Francisco?
August
Weather in August
August, the last month of the summer in South San Francisco, is also an agreeable month, with an average temperature ranging between min 56.5°F (13.6°C) and max 69.1°F (20.6°C).Temperature
South San Francisco sees the arrival of August with an average high-temperature of a still pleasant 69.1°F (20.6°C), indicating a subtle variation from July. South San Francisco records a consistent low-temperature of 56.5°F (13.6°C) during August nights.Humidity
The most humid month is August, with an average relative humidity of 78%.Rainfall
June through August are months with the least rain when the rain falls for 1.5 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
In South San Francisco, the average length of the day in August is 13h and 34min.On the first day of the month, sunrise is at 6:14 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:39 am and sunset at 7:39 pm PDT.
Sunshine
The average sunshine in August is 11.5h.UV index
June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 5 in August, converts into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
South San Francisco, CA
- Average high temperature in August: 69.1°F
The warmest month (with the highest average high temperature) is September (70°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in August: 56.5°F
The months with the highest average low temperature are August and September (56.5°F).
The coldest months (with the lowest average low temperature) are January, February and December (47.8°F).
Average pressure in August
South San Francisco, CA
- Average pressure in August: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in August
South San Francisco, CA
- Average wind speed in August: 6.3mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).
Average humidity in August
South San Francisco, CA
- Average humidity in August: 78%
The month with the highest relative humidity is August (78%).
The months with the lowest relative humidity are October and November (71%).
Average rainfall in August
South San Francisco, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is February (0.79").
The driest months (with the least rainfall) are June, July and August (0.04").
Average rainfall days in August
South San Francisco, CA
- Average rainfall days in August: 1.5 days
The month with the highest number of rainy days is March (9.4 days).
The month with the least rainy days is June (1.1 days).
Average daylight in August /
Average sunshine in August
South San Francisco, 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 30min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in August
South San Francisco, CA
- Average sunshine days in August: 25 days
The months with the most sunshine days are June, July and September (26.3 days).
The month with the least sunshine days is March (19.4 days).
Average UV index in August
South San Francisco, CA
- Average UV index in August: 5
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February and December (UV index 3).
Average cloud cover in August
South San Francisco, CA
- Average cloud cover in August: 19
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility in August
South San Francisco, 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).
