August weather forecastPetaluma, CA
August
Weather in August
The last month of the summer, August, is another warm month in Petaluma, California, with an average temperature varying between 55°F (12.8°C) and 77.9°F (25.5°C).Temperature
Petaluma experiences its highest temperatures in August, with an average peak of 77.9°F (25.5°C) and a low of 55°F (12.8°C).Humidity
In Petaluma, the average relative humidity in August is 69%.Rainfall
The months with the least rainfall are July and August Rain falls for 1.1 days and accumulates 0.04" (1mm) of rain.Daylight
In Petaluma, California, the average length of the day in August is 13h and 36min.On the first day of the month, sunrise is at 6:13 am and sunset at 8:19 pm. On the last day of August, sunrise is at 6:40 am and sunset at 7:41 pm PDT.
Sunshine
In Petaluma, the average sunshine in August is 11.8h.UV index
In August, the average daily maximum UV index in Petaluma is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 5 in August transforms into the following instructions:
Heed the precautions - It is counselled to guard against solar damage. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Petaluma, CA
- Average high temperature in August: 77.9°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in August: 55°F
The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is December (43.2°F).
Average pressure in August
Petaluma, 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
Petaluma, CA
- Average wind speed in August: 5.3mph
The windiest months (with the highest average wind speed) are April and May (7mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in August
Petaluma, CA
- Average humidity in August: 69%
The month with the highest relative humidity is March (77%).
The months with the lowest relative humidity are September and October (65%).
Average rainfall in August
Petaluma, CA
- Average rainfall in August: 0.04"
The wettest month (with the highest rainfall) is February (3.5").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in August
Petaluma, CA
- Average rainfall days in August: 1.1 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is July (1 days).
Average daylight in August /
Average sunshine in August
Petaluma, 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: 11h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in August
Petaluma, CA
- Average sunshine days in August: 27.3 days
The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is March (17.2 days).
Average UV index in August
Petaluma, CA
- Average UV index in August: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in August
Petaluma, CA
- Average cloud cover in August: 12
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in August
Petaluma, 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).
