McCormack Slough Rainfall Forecast

Today 28 Mar
5%
Sun 29 Mar
15%
Mon 30 Mar
No Rain
Tue 31 Mar
5%
Wed 1 Apr
65%
Thu 2 Apr
35%
Fri 3 Apr
5%

McCormack Slough Rainfall Statistics

March Rainfall

Hermiston, Hermiston Municipal Airport (16.2 miles)

Total Rainfall 2026
2.6in
Daily Average 2026
0.03in
Wettest Day 8 February, 2026
0.7in
Wet Days 2026
20/87 (23%)
Total Rainfall February
1.8in
Daily Average February
0.1in
Wettest Day 8 February, 2026
0.7in
Wet Days February
9/28 (32%)
Total Rainfall March
0.5in
Daily Average March
0.02in
Wettest Day 21 March, 2026
0.2in
Wet Days March
6/28 (21%)

Climate (2010–Present)

Hermiston, Hermiston Municipal Airport (16.2 miles)

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Annual Average 2021–2025
9.4in
Monthly Average 2021–2026
0.8in
Daily Average 2021–2026
0.03in
Wettest Day 5 May, 2024
1.1in

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