Yellowstone Rainfall Forecast

Today 15 Sep
No Rain
Tue 16 Sep
No Rain
Wed 17 Sep
10%
Thu 18 Sep
10%
Fri 19 Sep
20%
Sat 20 Sep
35%
Sun 21 Sep
35%

Yellowstone Rainfall Statistics

September Rainfall

Iowa County Airport (14.3 miles)

Total Rainfall 2025
38.7in
Daily Average 2025
0.2in
Wettest Day 23 June, 2025
5.2in
Wet Days 2025
57/258 (22%)
Total Rainfall August
8.4in
Daily Average August
0.3in
Wettest Day 10 August, 2025
3.7in
Wet Days August
10/31 (32%)
Total Rainfall September
0.1in
Daily Average September
0.01in
Wettest Day 3 September, 2025
0.1in
Wet Days September
2/15 (13%)

Climate (2010–Present)

Iowa County Airport (14.3 miles)

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Annual Average 2020–2024
28.1in
Monthly Average 2020–2025
2.8in
Daily Average 2020–2025
0.1in
Wettest Day 23 June, 2025
5.2in

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