Mount St Helens Rainfall Forecast

Today 21 May
60%
Thu 22 May
55%
Fri 23 May
10%
Sat 24 May
5%
Sun 25 May
30%
Mon 26 May
40%
Tue 27 May
30%

Mount St Helens Rainfall Statistics

May Rainfall

Southwest Washington Regional Airport (33.6 miles)

Total Rainfall 2025
13.1in
Daily Average 2025
0.1in
Wettest Day 24 February, 2025
0.8in
Wet Days 2025
70/141 (50%)
Total Rainfall April
1.7in
Daily Average April
0.1in
Wettest Day 7 April, 2025
0.6in
Wet Days April
11/30 (37%)
Total Rainfall May
1.1in
Daily Average May
0.1in
Wettest Day 11 May, 2025
0.5in
Wet Days May
8/21 (38%)

Climate (2010–Present)

Southwest Washington Regional Airport (33.6 miles)

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Annual Average 2020–2024
39.1in
Monthly Average 2020–2025
3.2in
Daily Average 2020–2025
0.1in
Wettest Day 4 November, 2022
4.2in

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