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United States weather

10 day weather forecast for San Mateo County

Wednesday, October 28th, 2026, at 05:19 AM
Today
Partly cloudy
18° 11°
Tomorrow
Overcast
18° 12°
Friday
Sunny
17° 13°
Saturday
Overcast
17° 12°
Sunday
Sunny
20° 11°
Monday
Partly cloudy
20° 12°
Tuesday
Partly cloudy
22° 13°
 More Details See
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San Mateo County Weather Pages

San Mateo County weather forecast

The weather forecast for San Mateo County over the next 5 days indicates chilly conditions with temperatures ranging from 17 °C to 20 °C.

Wind speeds are expected to be breezy, averaging around 18.4 km/h.

Weather today

San Mateo County 14 days weather forecast

This weeks weather in San Mateo County. Click on a date for detailed forecasts
Wed. 28
18°
11°
Partly cloudy
0 mm
Thu. 29
18°
12°
Overcast
0 mm
Fri. 30
17°
13°
Sunny
0 mm
Sat. 31
17°
12°
Overcast
0 mm
Sun. 1
20°
11°
Sunny
0 mm
Mon. 2
20°
12°
Partly cloudy
0 mm
Tue. 3
22°
13°
Partly cloudy
0 mm
Wed. 4
20°
13°
Patchy rain possible
1.7 mm
Thu. 5
18°
13°
Overcast
0 mm
Fri. 6
18°
16°
Light rain
9.4 mm
Sat. 7
18°
15°
Light rain
3.1 mm
Sun. 8
18°
15°
Patchy rain possible
0.3 mm
Mon. 9
18°
14°
Partly cloudy
0 mm
Tue. 10
20°
14°
Partly cloudy
0 mm
Further Ahead
Select a date

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Access San Mateo County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
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San Mateo County long range weather forecast

30 day weather forecast for San Mateo County
September
November
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Moderate rain
25°
2
Sunny
24°
3
Sunny
22°
4
Overcast
23°
5
Partly cloudy
23°
6
Cloudy
25°
7
Cloudy
25°
8
Overcast
21°
9
Overcast
19°
10
Overcast
18°
11
Overcast
17°
12
Overcast
17°
13
Moderate rain
19°
14
Overcast
17°
15
Overcast
19°
16
Patchy rain possible
19°
17
Overcast
21°
18
Sunny
21°
19
Sunny
19°
20
Sunny
22°
21
Overcast
20°
22
Light rain
16°
23
Overcast
17°
24
Sunny
19°
25
Overcast
19°
26
Cloudy
18°
27
Cloudy
18°
28
Partly cloudy
18°
29
Overcast
18°
30
Sunny
17°
31
Overcast
17°
Important Notice
Our San Mateo County long range weather forecast is based on historical data analysis rather than real-time forecasting models. While this provides a general outlook, weather conditions can change. We recommend checking the forecast closer to your planned date for the most current information.

Rain Forecast for the Next 14 Days in San Mateo County

A total of 14.6 mm is expected over 3 rainy days. The wettest day is Friday 6, with 9.4 mm. Click a day for details.
Wed. 28
0 mm
12%
Thu. 29
0 mm
19%
Fri. 30
0 mm
10%
Sat. 31
0 mm
12%
Sun. 1
0 mm
3%
Mon. 2
0 mm
4%
Tue. 3
0 mm
4%
Wed. 4
1.7
1.7 mm
57%
Thu. 5
0 mm
25%
Fri. 6
9.4
9.4 mm
83%
Sat. 7
3.1
3.1 mm
77%
Sun. 8
0.3
0.3 mm
37%
Mon. 9
0 mm
12%
Tue. 10
0 mm
8%

Frequently asked questions about the weather in San Mateo County

How warm is it in San Mateo County over the next 14 days?
Over the next two weeks, temperatures in San Mateo County are expected to range from around 11 °C on the coldest nights up to about 22 °C on the warmest days. Use this range to plan what to pack and wear.

Will it rain in San Mateo County in the next two weeks?
Yes - rain is expected on about 3 of the next 14 days in San Mateo County, with roughly 14.6 mm of rainfall in total. It is worth keeping an umbrella or raincoat handy.

How windy is it in San Mateo County?
Maximum wind speeds in San Mateo County are forecast to reach about 20.5 km/h at their peak over the next 14 days.

When is the best time to visit San Mateo County?
For a month-by-month look at temperatures and rainfall, see our best time to visit San Mateo County guide.

How accurate is the 14-day forecast for San Mateo County?
Our San Mateo County forecast uses leading meteorological models and is most reliable over the next few days. Long-range days beyond a week show general trends and can change, so check back closer to the date for updates.
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