California · county areal climate 1951–2025

Contra Costa County, CA

A 18.8" / 60.6°F normal · 2025 ran 74% of normal precipitation.
2026 so far · through Jul 25: This area is at 72% (8.48") of the 1996–2025 to-date normal — the 24th driest start of 76 years. Temperature +2.9°F vs normal. U.S. year-to-date →

Normal (1996–2025)

18.8in
annual precipitation · 60.6°F

2025 vs Normal

74%
14.0" · 60.9°F (+0.3 vs normal)

Wettest Year

38.4in
1983

Driest Year

5.2in
2013

Biggest Rain Day

3.36in
Oct 25 · 2021

Warmest Year

62.8°F
2014

Record

1951–2025
75 complete years · NOAA nClimGrid

Monthly Climate

48°
J
51°
F
54°
M
58°
A
63°
M
69°
J
72°
J
72°
A
70°
S
64°
O
55°
N
48°
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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