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Weather in San Mateo, California for August 2025

Your guide to San Mateo weather in August - trends and predictions

    Temperatures

  • In general, the average temperature in San Mateo at the beginning of August is 19.6 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 21.1 °F by the end of August.

    • Rain 🌧️

  • With an average of 2 rainy days, San Mateo experiences minimal rainfall in August.

    • More

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Average dry days
29
Dry days
Average rainy days
2
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/13°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
79 %
Avg humidity

San Mateo Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
19°
2
Cloudy
20°
3
Overcast
19°
4
Overcast
19°
5
Overcast
19°
6
Sunny
21°
7
Sunny
20°
8
Overcast
18°
9
Overcast
19°
10
Overcast
18°
11
Overcast
17°
12
Overcast
17°
13
Partly cloudy
19°
14
Partly cloudy
18°
15
Partly cloudy
19°
16
Sunny
18°
17
Patchy rain possible
20°
18
Overcast
18°
19
Sunny
18°
20
Sunny
21°
21
Sunny
18°
22
Patchy rain possible
18°
23
Patchy rain possible
19°
24
Patchy rain possible
20°
25
Sunny
22°
26
Sunny
22°
27
Overcast
23°
28
Sunny
22°
29
Sunny
20°
30
Sunny
20°
31
Partly cloudy
19°

Temperatures trend during August in San Mateo

See the weather trend as well as the moving average line

August weather in San Mateo day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Overcast
Overcast
 19° /13° 0 mm 4
Aug. 2 Cloudy
Cloudy
 20° /14° 0 mm 5
Aug. 3 Overcast
Overcast
 19° /13° 0 mm 4
Aug. 4 Overcast
Overcast
 19° /12° 0 mm 4
Aug. 5 Overcast
Overcast
 19° /12° 0 mm 4
Aug. 6 Sunny
Sunny
 21° /12° 0 mm 6
Aug. 7 Sunny
Sunny
 20° /12° 0 mm 6
Aug. 8 Overcast
Overcast
 18° /13° 0 mm 4
Aug. 9 Overcast
Overcast
 19° /13° 0 mm 4
Aug. 10 Overcast
Overcast
 18° /12° 0 mm 4
Aug. 11 Overcast
Overcast
 17° /13° 0 mm 4
Aug. 12 Overcast
Overcast
 17° /12° 0 mm 4
Aug. 13 Partly cloudy
Partly cloudy
 19° /12° 0 mm 5
Aug. 14 Partly cloudy
Partly cloudy
 18° /13° 0 mm 5
Aug. 15 Partly cloudy
Partly cloudy
 19° /13° 0 mm 5
Aug. 16 Sunny
Sunny
 18° /12° 0 mm 5
Aug. 17 Patchy rain possible
Patchy rain possible
 20° /13° 0.2 mm 5
Aug. 18 Overcast
Overcast
 18° /13° 0 mm 4
Aug. 19 Sunny
Sunny
 18° /12° 0 mm 5
Aug. 20 Sunny
Sunny
 21° /13° 0 mm 6
Aug. 21 Sunny
Sunny
 18° /13° 0 mm 5
Aug. 22 Patchy rain possible
Patchy rain possible
 18° /14° 0.8 mm 4
Aug. 23 Patchy rain possible
Patchy rain possible
 19° /13° 0.2 mm 4
Aug. 24 Patchy rain possible
Patchy rain possible
 20° /14° 0.4 mm 5
Aug. 25 Sunny
Sunny
 22° /13° 0 mm 6
Aug. 26 Sunny
Sunny
 22° /14° 0 mm 6
Aug. 27 Overcast
Overcast
 23° /13° 0 mm 5
Aug. 28 Sunny
Sunny
 22° /14° 0 mm 6
Aug. 29 Sunny
Sunny
 20° /14° 0 mm 6
Aug. 30 Sunny
Sunny
 20° /14° 0 mm 6
Aug. 31 Partly cloudy
Partly cloudy
 19° /14° 0 mm 5
Next
Important Notice
Our weather forecast for San Mateo in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Mateo forecast closer to your planned date for the most up-to-date weather information.
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San Mateo in August - FAQ

What are the expected maximum and minimum temperatures in San Mateo during August?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Mateo during August?
Rainfall in San Mateo during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in San Mateo during August?
The average wind speed in San Mateo during August is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in San Mateo

Explore the daily rainfall trends and prepare for San Mateos August weather 💧

UV exposure in San Mateo during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

Quick links

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Location coordinates Where is San Mateo?

Get accurate weather forecasts for San Mateo, located at latitude 37.563 and longitude -122.326. Stay updated with localized weather information tailored for San Mateo.

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