Grand Coulee Dam Airport Rainfall Forecast

Today 2 Sep
No Rain
Wed 3 Sep
No Rain
Thu 4 Sep
No Rain
Fri 5 Sep
5%
Sat 6 Sep
25%
Sun 7 Sep
25%
Mon 8 Sep
25%

Grand Coulee Dam Airport Rainfall Statistics

September Rainfall

Omak Airport (42.3 miles)

Total Rainfall 2025
4.4in
Daily Average 2025
0.02in
Wettest Day 6 August, 2025
0.4in
Wet Days 2025
50/245 (20%)
Total Rainfall August
0.8in
Daily Average August
0.03in
Wettest Day 6 August, 2025
0.4in
Wet Days August
5/31 (16%)
Total Rainfall September
–
Daily Average September
–
Wettest Day 3 September, 2025
–
Wet Days September
–

Climate (2010–Present)

Omak Airport (42.3 miles)

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Annual Average 2020–2024
11.4in
Monthly Average 2020–2025
0.9in
Daily Average 2020–2025
0.03in
Wettest Day 10 December, 2022
0.9in

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