Iowa · county areal climate 1951–2025

Johnson County, IA

A 35.9" / 49.7°F normal · 2025 ran 80% of normal precipitation.
2026 so far · through Jul 25: This area is at 109% (23.34") of the 1996–2025 to-date normal — the 24th wettest start of 76 years. Temperature +2.3°F vs normal. U.S. year-to-date →

Normal (1996–2025)

35.9in
annual precipitation · 49.7°F

2025 vs Normal

80%
28.6" · 50.7°F (+1 vs normal)

Wettest Year

58.3in
1993

Driest Year

20.7in
1988

Biggest Rain Day

4.2in
Apr 18 · 2013

Warmest Year

52.9°F
2012

Record

1951–2025
75 complete years · NOAA nClimGrid

Monthly Climate

21°
J
25°
F
38°
M
50°
A
61°
M
71°
J
74°
J
72°
A
65°
S
52°
O
39°
N
27°
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.

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