California · county areal climate 1951–2025

San Mateo County, CA

A 28.0" / 57.3°F normal · 2025 ran 83% of normal precipitation.
2026 so far · through Jul 25: This area is at 86% (15.09") of the 1996–2025 to-date normal — the 32nd driest start of 76 years. Temperature +2.4°F vs normal. U.S. year-to-date →

Normal (1996–2025)

28.0in
annual precipitation · 57.3°F

2025 vs Normal

83%
23.2" · 57.7°F (+0.4 vs normal)

Wettest Year

60.2in
1983

Driest Year

6.2in
2013

Biggest Rain Day

4.89in
Jan 5 · 1982

Warmest Year

59.7°F
2014

Record

1951–2025
75 complete years · NOAA nClimGrid

Monthly Climate

51°
J
51°
F
53°
M
55°
A
58°
M
61°
J
64°
J
65°
A
65°
S
61°
O
54°
N
50°
D
—— normal temperature (°F) · ▮ normal precipitation (in) · 1996–2025
Areal nClimGrid averages (NOAA/NCEI) over the whole area — an average across the region, not a single station. Separate from the station records.

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