California · county areal climate 1951–2025
Contra Costa County, CA
A 60.6°F / 18.8" normal · 2025 ran +0.3°F vs normal.
2026 so far · through Jul 10: This area is running
+3°F (61.2°F) vs the 1996–2025 to-date normal — the
1st warmest start of 76 years. Precipitation
72% of normal.
U.S. year-to-date → Normal (1996–2025)
60.6°F
annual mean · 18.8" precipitation
2025 vs Normal
+0.3°F
60.9°F · 14.0" (74% of normal)
Warmest Year
62.8°F
2014 · coldest 57.7°F (1955)
Wettest Year
38.4in
1983 · driest 5.2" (2013)
Hottest Day
109.7°F
Sep 7 · 2022
Coldest Day
18.5°F
Dec 22 · 1990
Biggest Rain Day
3.36in
Oct 25 · 2021
Record
1951–2025
75 complete years · NOAA nClimGrid
—— 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.