Ohio · county areal climate 1951–2025
Mercer County, OH
A 51.5°F / 39.1" normal · 2025 ran -0.2°F vs normal.
2026 so far · through Jul 9: This area is running
+1.2°F (48.9°F) vs the 1996–2025 to-date normal — the
11th warmest start of 76 years. Precipitation
99% of normal.
U.S. year-to-date → Normal (1996–2025)
51.5°F
annual mean · 39.1" precipitation
2025 vs Normal
-0.2°F
51.3°F · 31.7" (81% of normal)
Warmest Year
54.2°F
2024 · coldest 47.8°F (1978)
Wettest Year
53.2in
2003 · driest 23.7" (1963)
Hottest Day
104.4°F
Jun 29 · 2012
Coldest Day
-23.6°F
Jan 19 · 1994
Biggest Rain Day
3.54in
Sep 8 · 2020
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.