Colorado · county areal climate 1951–2025
Boulder County, CO
A 45.5°F / 20.5" normal · 2025 ran +0.9°F vs normal.
2026 so far · through Jul 9: This area is running
+4.2°F (46.3°F) vs the 1996–2025 to-date normal — the
1st warmest start of 76 years. Precipitation
65% of normal.
U.S. year-to-date → Normal (1996–2025)
45.5°F
annual mean · 20.5" precipitation
2025 vs Normal
+0.9°F
46.4°F · 17.8" (87% of normal)
Warmest Year
47.3°F
2012 · coldest 42.0°F (1951)
Wettest Year
28.4in
1957 · driest 12.8" (1954)
Hottest Day
94.0°F
Jul 22 · 2005
Coldest Day
-32.1°F
Feb 1 · 1951
Biggest Rain Day
2.82in
Apr 2 · 1957
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.