Umatilla National Wildlife Refuge Rainfall Forecast

Today 13 Sep
20%
Sun 14 Sep
70%
Mon 15 Sep
5%
Tue 16 Sep
No Rain
Wed 17 Sep
5%
Thu 18 Sep
5%
Fri 19 Sep
15%

Umatilla National Wildlife Refuge Rainfall Statistics

September Rainfall

Hermiston, Hermiston Municipal Airport (16.2 miles)

Total Rainfall 2025
6.3in
Daily Average 2025
0.02in
Wettest Day 7 April, 2025
0.6in
Wet Days 2025
49/256 (19%)
Total Rainfall August
0.2in
Daily Average August
0.01in
Wettest Day 16 August, 2025
0.1in
Wet Days August
3/31 (10%)
Total Rainfall September
0.4in
Daily Average September
0.04in
Wettest Day 11 September, 2025
0.4in
Wet Days September
4/13 (31%)

Climate (2010–Present)

Hermiston, Hermiston Municipal Airport (16.2 miles)

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Annual Average 2020–2024
8.2in
Monthly Average 2020–2025
0.8in
Daily Average 2020–2025
0.03in
Wettest Day 5 May, 2024
1.1in

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