August weather forecastSan Geronimo, CA
August
Weather in August
The last month of the summer, August, is another pleasant month in San Geronimo, California, with an average temperature ranging between min 56.1°F (13.4°C) and max 69.4°F (20.8°C).Temperature
August notes an average high-temperature of a still pleasant 69.4°F (20.8°C), subtly differing from July's 68.5°F (20.3°C). San Geronimo's nighttime temperature in August drops to an average of 56.1°F (13.4°C).Humidity
With an average relative humidity of 78%, August is the most humid month in San Geronimo.Rainfall
The months with the least rainfall in San Geronimo are July and August Rain falls for 2.7 days and accumulates 0.08" (2mm) of rain.Snowfall
January through November are months without snowfall in San Geronimo.Daylight
In August, the average length of the day is 13h and 35min.On the first day of August in San Geronimo, sunrise is at 6:14 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 7:41 pm PDT.
Sunshine
In August, the average sunshine in San Geronimo, California, is 10.9h.UV index
The months with the highest UV index in San Geronimo, California, are June through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 5 during August translates into the following directions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The Sun's radiation is especially intense around midday; try to stay in shade during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
San Geronimo, CA
- Average high temperature in August: 69.4°F
The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in August: 56.1°F
The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).
Average pressure in August
San Geronimo, 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
San Geronimo, CA
- Average wind speed in August: 6.5mph
The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).
Average humidity in August
San Geronimo, CA
- Average humidity in August: 78%
The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in August
San Geronimo, CA
- Average rainfall in August: 0.08"
The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in August
San Geronimo, CA
- Average rainfall days in August: 2.7 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall days in August
San Geronimo, CA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in August /
Average sunshine in August
San Geronimo, CA
- Average daylight in August: 13h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in August: 10h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in August
San Geronimo, CA
- Average sunshine days in August: 23.4 days
The months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).
Average UV index in August
San Geronimo, 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, November and December (UV index 3).
Average cloud cover in August
San Geronimo, CA
- Average cloud cover in August: 25
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in August
San Geronimo, 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).
