Hourly Weather Forecast - San Mateo, CA

5 AM
55°F
70%
3mph
SW
70% Chance of Light Rain
Humidity
100%
Feels like
55°F
Dew Point
55°F
6 AM
56°F
70%
2mph
WSW
70% Chance of Light Rain
Humidity
100%
Feels like
56°F
Dew Point
56°F
7 AM
56°F
70%
2mph
WSW
70% Chance of Light Rain
Humidity
100%
Feels like
56°F
Dew Point
56°F
7:19 AM
8 AM
57°F
20%
2mph
SW
Foggy
Humidity
100%
Feels like
57°F
Dew Point
56°F
9 AM
57°F
20%
2mph
SSW
Foggy
Humidity
100%
Feels like
57°F
Dew Point
57°F
10 AM
57°F
20%
3mph
SSE
Foggy
Humidity
100%
Feels like
57°F
Dew Point
57°F
11 AM
58°F
30%
2mph
SE
30% Chance of Light Rain
Humidity
100%
Feels like
58°F
Dew Point
58°F
12 PM
57°F
20%
2mph
ESE
Foggy
Humidity
100%
Feels like
57°F
Dew Point
57°F
1 PM
57°F
30%
2mph
E
30% Chance of Light Rain
Humidity
100%
Feels like
57°F
Dew Point
57°F
2 PM
57°F
30%
2mph
E
30% Chance of Light Rain
Humidity
100%
Feels like
57°F
Dew Point
57°F
3 PM
56°F
40%
3mph
SSE
40% Chance of Light Rain
Humidity
100%
Feels like
56°F
Dew Point
56°F
4 PM
56°F
40%
3mph
S
40% Chance of Light Rain
Humidity
100%
Feels like
56°F
Dew Point
56°F
4:53 PM
5 PM
55°F
50%
2mph
S
50% Chance of Light Rain
Humidity
98%
Feels like
55°F
Dew Point
55°F
6 PM
55°F
50%
3mph
S
50% Chance of Light Rain
Humidity
96%
Feels like
55°F
Dew Point
54°F
7 PM
56°F
60%
3mph
S
60% Chance of Light Rain
Humidity
95%
Feels like
56°F
Dew Point
54°F
8 PM
56°F
60%
4mph
S
60% Chance of Light Rain
Humidity
95%
Feels like
56°F
Dew Point
55°F
9 PM
56°F
50%
5mph
S
50% Chance of Light Rain
Humidity
95%
Feels like
56°F
Dew Point
55°F
10 PM
56°F
60%
6mph
S
60% Chance of Light Rain
Humidity
95%
Feels like
56°F
Dew Point
55°F
11 PM
56°F
50%
6mph
SSW
50% Chance of Light Rain
Humidity
96%
Feels like
56°F
Dew Point
55°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Weekend Weather Outlook

Weekend Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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