Colorado · county areal climate 1951–2025

Jefferson County, CO

A 18.4" / 47.0°F normal · 2025 ran 88% of normal precipitation.
2026 so far · through Jul 25: This area is at 62% (7.13") of the 1996–2025 to-date normal — the 3rd driest start of 76 years. Temperature +4.4°F vs normal. U.S. year-to-date →

Normal (1996–2025)

18.4in
annual precipitation · 47.0°F

2025 vs Normal

88%
16.1" · 48.4°F (+1.4 vs normal)

Wettest Year

25.7in
1969

Driest Year

11.8in
1962

Biggest Rain Day

2.89in
May 7 · 1969

Warmest Year

48.7°F
2012

Record

1951–2025
75 complete years · NOAA nClimGrid

Monthly Climate

30°
J
30°
F
37°
M
43°
A
52°
M
62°
J
68°
J
66°
A
59°
S
48°
O
38°
N
30°
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.

Nearby

← All Colorado countiesU.S. overview
DriestSince · browse by state · precipitation & snowfall records · NOAA/RCC-ACIS ThreadEx gauge record · part of Weather Trader · supported by Substack Subscribers
© 2026 Weather Trader · All rights reserved