Boulder Rainfall Forecast

Today 9 Aug
15%
Sun 10 Aug
5%
Mon 11 Aug
No Rain
Tue 12 Aug
5%
Wed 13 Aug
10%
Thu 14 Aug
15%
Fri 15 Aug
15%

Boulder Rainfall Statistics

August Rainfall

Helena Regional Airport (26.1 miles)

Total Rainfall 2025
9in
Daily Average 2025
0.04in
Wettest Day 14 May, 2025
1in
Wet Days 2025
69/221 (31%)
Total Rainfall July
1.1in
Daily Average July
0.04in
Wettest Day 31 July, 2025
0.5in
Wet Days July
9/31 (29%)
Total Rainfall August
0.4in
Daily Average August
0.1in
Wettest Day 4 August, 2025
0.2in
Wet Days August
2/9 (22%)

Climate (2010–Present)

Helena Regional Airport (26.1 miles)

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Annual Average 2020–2024
10.5in
Monthly Average 2020–2025
0.9in
Daily Average 2020–2025
0.03in
Wettest Day 22 September, 2023
1.3in

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