Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
During July, San Mateo observes a subtle ascent to a still pleasant 70.9°F (21.6°C) from June's 68.5°F (20.3°C) in the average high-temperature. An average temperature of 54.7°F (12.6°C) is recorded during the nights in July.Humidity
The average relative humidity in July is 75%.Rainfall
In San Mateo, California, rain does not fall in June through August.Daylight
In July, the average length of the day in San Mateo is 14h and 27min.On the first day of July, sunrise is at 5:52 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:18 pm PDT.
Sunshine
The month with the most sunshine is July, with an average of 12h 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 reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 5 in July transforms into this advice:
Guard yourself - Precautionary measures against sun damage are advocated. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. 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
What are July temperatures?
What is the average humidity in July?
What is the driest month?
How many hours of daylight does San Mateo have in July?
When are sunrise and sunset in July?
What month has the most sunshine?
How many hours of sunshine does San Mateo have in July?
What are the months with the highest UV index in San Mateo?
How high is the UV index in July?
Average temperature in July
San Mateo, CA
- Average high temperature in July: 70.9°F
The warmest months (with the highest average high temperature) are August and September (71.2°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 (56.7°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in July
San Mateo, 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 Mateo, CA
- Average wind speed in July: 6mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.9mph).
Average humidity in July
San Mateo, CA
- Average humidity in July: 75%
The months with the highest relative humidity are March and August (76%).
The months with the lowest relative humidity are October and November (70%).
Average rainfall in July
San Mateo, CA
- Average rainfall in July: 0"
The wettest month (with the highest rainfall) is February (0.55").
The driest months (with the least rainfall) are June, July and August (0").
Average rainfall days in July
San Mateo, CA
- Average rainfall days in July: 0.3 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is July (0.3 days).
Average daylight in July /
Average sunshine in July
San Mateo, CA
- Average daylight in July: 14h and 3min
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: 12h and 0min
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 July
San Mateo, CA
- Average sunshine days in July: 30.4 days
The month with the most sunshine days is July (30.4 days).
The month with the least sunshine days is February (23.3 days).
Average UV index in July
San Mateo, 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 and December (UV index 3).
Average cloud cover in July
San Mateo, CA
- Average cloud cover in July: 11
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in July
San Mateo, 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).
San Mateo, California, USA
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