Umatilla National Forest Rainfall Forecast

Today 29 Dec
No Rain
Tue 30 Dec
No Rain
Wed 31 Dec
15%
Thu 1 Jan
65%
Fri 2 Jan
65%
Sat 3 Jan
60%
Sun 4 Jan
45%

Umatilla National Forest Rainfall Statistics

December Rainfall

Grant County Regional Airport (35.4 miles)

Total Rainfall 2025
19.9in
Daily Average 2025
0.1in
Wettest Day 5 December, 2025
1.2in
Wet Days 2025
102/363 (28%)
Total Rainfall November
1.2in
Daily Average November
0.04in
Wettest Day 30 November, 2025
0.3in
Wet Days November
14/30 (47%)
Total Rainfall December
3.8in
Daily Average December
0.1in
Wettest Day 5 December, 2025
1.2in
Wet Days December
13/29 (45%)

Climate (2010–Present)

Grant County Regional Airport (35.4 miles)

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Annual Average 2020–2024
14.6in
Monthly Average 2020–2025
1.3in
Daily Average 2020–2025
0.05in
Wettest Day 5 December, 2025
1.2in

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