Great Falls Rainfall Forecast

Today 18 May
90%
Tue 19 May
25%
Wed 20 May
60%
Thu 21 May
60%
Fri 22 May
15%
Sat 23 May
5%
Sun 24 May
5%

Great Falls Rainfall Statistics

May Rainfall

Great Falls, Great Falls International Airport (3.7 miles)

Total Rainfall 2026
4.4in
Daily Average 2026
0.03in
Wettest Day 2 April, 2026
1in
Wet Days 2026
34/138 (25%)
Total Rainfall April
1.9in
Daily Average April
0.1in
Wettest Day 2 April, 2026
1in
Wet Days April
11/30 (37%)
Total Rainfall May
0.5in
Daily Average May
0.03in
Wettest Day 9 May, 2026
0.2in
Wet Days May
5/18 (28%)

Climate (2010–Present)

Great Falls, Great Falls International Airport (3.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

Annual Average 2021–2025
13.9in
Monthly Average 2021–2026
1.2in
Daily Average 2021–2026
0.04in
Wettest Day 2 June, 2023
1.4in

Get WillyWeather+ to remove ads