Montana · county areal climate 1951–2025

Custer County, MT

A 14.3" / 45.8°F normal · 2025 ran 119% of normal precipitation.
2026 so far · through Jul 25: This area is at 68% (6.5") of the 1996–2025 to-date normal — the 15th driest start of 76 years. Temperature +4.1°F vs normal. U.S. year-to-date →

Normal (1996–2025)

14.3in
annual precipitation · 45.8°F

2025 vs Normal

119%
17.1" · 46.9°F (+1.1 vs normal)

Wettest Year

20.7in
2011

Driest Year

6.5in
1988

Biggest Rain Day

2.32in
Oct 2 · 1971

Warmest Year

48.5°F
2012

Record

1951–2025
75 complete years · NOAA nClimGrid

Monthly Climate

20°
J
23°
F
34°
M
44°
A
54°
M
65°
J
74°
J
71°
A
61°
S
46°
O
33°
N
22°
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 Montana 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