July weather forecastSan Bruno, CA
July
Weather in July
July is a pleasant summer month in San Bruno, California, with an average temperature fluctuating between 68.5°F (20.3°C) and 54.7°F (12.6°C).Temperature
July's weather displays an average high-temperature of an agreeable 68.5°F (20.3°C), slightly varied from June's 67.3°F (19.6°C). In San Bruno, an average temperature of 54.7°F (12.6°C) is noted during July nights.Humidity
In San Bruno, the average relative humidity in July is 77%.Rainfall
The months with the least rainfall are July and August Rain falls for 2.2 days and accumulates 0.04" (1mm) of rain.Daylight
In July, the average length of the day is 14h and 28min.On the first day of July, sunrise is at 5:52 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:18 pm PDT.
Sunshine
July has the most sunshine of the year, with an average of 11.8h of sunshine.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 5 during July translates into the following guidance:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
San Bruno, CA
- Average high temperature in July: 68.5°F
The warmest month (with the highest average high temperature) is September (69.8°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in July: 54.7°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is December (47.7°F).
Average pressure in July
San Bruno, CA
- Average pressure in July: 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 July
San Bruno, CA
- Average wind speed in July: 6.5mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest months (with the lowest average wind speed) are August and September (6.3mph).
Average humidity in July
San Bruno, CA
- Average humidity in July: 77%
The month with the highest relative humidity is August (79%).
The months with the lowest relative humidity are October and November (71%).
Average rainfall in July
San Bruno, CA
- Average rainfall in July: 0.04"
The wettest month (with the highest rainfall) is February (2.72").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in July
San Bruno, CA
- Average rainfall days in July: 2.2 days
The month with the highest number of rainy days is March (13.3 days).
The months with the least rainy days are July and August (2.2 days).
Average daylight in July /
Average sunshine in July
San Bruno, CA
- Average daylight in July: 14h and 30min
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 July: 11h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in July
San Bruno, CA
- Average sunshine days in July: 27.3 days
The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.3 days).
Average UV index in July
San Bruno, CA
- Average UV index in July: 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 July
San Bruno, CA
- Average cloud cover in July: 17
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 July
San Bruno, CA
- Average visibility in July: 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).
