New Jersey · county areal climate 1951–2025
Mercer County, NJ
A 54.5°F / 47.5" normal · 2025 ran -0.5°F vs normal.
2026 so far · through Jul 9: This area is running
-0.3°F (50.2°F) vs the 1996–2025 to-date normal — the
55th coldest start of 76 years. Precipitation
74% of normal.
U.S. year-to-date → Normal (1996–2025)
54.5°F
annual mean · 47.5" precipitation
2025 vs Normal
-0.5°F
54.0°F · 37.8" (80% of normal)
Warmest Year
56.2°F
2012 · coldest 50.6°F (1958)
Wettest Year
64.5in
2018 · driest 29.9" (1965)
Hottest Day
103.5°F
Jul 7 · 2010
Coldest Day
-10.1°F
Jan 22 · 1961
Biggest Rain Day
7.77in
Aug 28 · 2011
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.