Iowa · county areal climate 1951–2025

Union County, IA

A 35.4" / 50.2°F normal · 2025 ran 93% of normal precipitation.
2026 so far · through Jul 25: This area is at 108% (22.54") of the 1996–2025 to-date normal — the 26th wettest start of 76 years. Temperature +3.3°F vs normal. U.S. year-to-date →

Normal (1996–2025)

35.4in
annual precipitation · 50.2°F

2025 vs Normal

93%
33.0" · 51.2°F (+1 vs normal)

Wettest Year

53.9in
1973

Driest Year

17.3in
1988

Biggest Rain Day

5.73in
Sep 15 · 1992

Warmest Year

53.5°F
2012

Record

1951–2025
75 complete years · NOAA nClimGrid

Monthly Climate

22°
J
26°
F
39°
M
50°
A
61°
M
71°
J
74°
J
72°
A
65°
S
53°
O
40°
N
28°
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 Iowa countiesU.S. overview
WettestSince · 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