Umatilla Rainfall Forecast

Today 13 Sep
55%
Mon 14 Sep
No Rain
Tue 15 Sep
10%
Wed 16 Sep
No Rain
Thu 17 Sep
5%
Fri 18 Sep
5%
Sat 19 Sep
No Rain

Umatilla Rainfall Statistics

September Rainfall

Hermiston, Hermiston Municipal Airport (6.8 miles)

Total Rainfall 2026
4.6in
Daily Average 2026
0.02in
Wettest Day 8 February, 2026
0.7in
Wet Days 2026
39/256 (15%)
Total Rainfall August
0.03in
Daily Average August
0in
Wettest Day 15 August, 2026
0.03in
Wet Days August
1/31 (3%)
Total Rainfall September
0.2in
Daily Average September
0.02in
Wettest Day 2 September, 2026
0.1in
Wet Days September
3/13 (23%)

Climate (2021–2025)

Hermiston, Hermiston Municipal Airport (6.8 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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