San Mateo County, CA Weather Forecast
County weather hub
Sunny
Compare major city weather across San Mateo County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 63.
County Weather Overview
This county weather page brings together forecast coverage for San Mateo County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 12 of 16 mapped cities in San Mateo County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 13 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 12:09 PM PDT
- Forecast office
- MTR
- Source
- NOAA / NWS
Daily Outlook
This Week in San Mateo County
Wednesday looks like the warmest upcoming period in San Mateo County at 64 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Tuesday at about 3 to 10 mph SW.
The forecast from Oct 13 through Oct 14 stays mostly dry.
Forecast Details
- Last updated
- Oct 8, 2026 12:09 PM PDT
- Coverage
- 3 days
- Time zone
- America/Los_Angeles
- Forecast office
- MTR
- Radar station
- KMUX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 56.
Sunny, with a high near 64.
Mostly clear, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Sunny
|
63°F |
3 to 10 mph
SW
|
|
Tuesday Night
Oct 13
|
Mostly Clear
|
56°F |
3 to 10 mph
SW
|
|
Wednesday
Oct 14
|
Sunny
|
64°F |
3 to 8 mph
W
|
|
Wednesday Night
Oct 14
|
Mostly Clear
|
54°F |
2 to 8 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across San Mateo County.
Coverage
Forecast coverage currently spans 12 of 16 mapped cities in San Mateo County.
Largest mapped city population in this region: 106,280.
