Helena Valley Regulating Reservoir Rainfall Forecast

Today 29 Nov
No Rain
Sun 30 Nov
No Rain
Mon 1 Dec
35%
Tue 2 Dec
80%
Wed 3 Dec
10%
Thu 4 Dec
25%
Fri 5 Dec
25%

Helena Valley Regulating Reservoir Rainfall Statistics

November Rainfall

Helena Regional Airport (5.6 miles)

Total Rainfall 2025
12.9in
Daily Average 2025
0.04in
Wettest Day 14 May, 2025
1in
Wet Days 2025
96/333 (29%)
Total Rainfall October
1.4in
Daily Average October
0.05in
Wettest Day 12 October, 2025
0.5in
Wet Days October
12/31 (39%)
Total Rainfall November
0.2in
Daily Average November
0.01in
Wettest Day 14 November, 2025
0.2in
Wet Days November
5/29 (17%)

Climate (2010–Present)

Helena Regional Airport (5.6 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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