Grand Coulee Rainfall Forecast

Today 15 Mar
30%
Mon 16 Mar
15%
Tue 17 Mar
15%
Wed 18 Mar
15%
Thu 19 Mar
20%
Fri 20 Mar
20%
Sat 21 Mar
10%

Grand Coulee Rainfall Statistics

March Rainfall

Omak Airport (42.9 miles)

Total Rainfall 2026
1.3in
Daily Average 2026
0.02in
Wettest Day 3 January, 2026
0.2in
Wet Days 2026
17/74 (23%)
Total Rainfall February
0.4in
Daily Average February
0.01in
Wettest Day 16 February, 2026
0.1in
Wet Days February
8/28 (29%)
Total Rainfall March
0.3in
Daily Average March
0.02in
Wettest Day 11 March, 2026
0.1in
Wet Days March
2/15 (13%)

Climate (2010–Present)

Omak Airport (42.9 miles)

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Annual Average 2021–2025
11.2in
Monthly Average 2021–2026
0.9in
Daily Average 2021–2026
0.03in
Wettest Day 10 December, 2022
0.9in

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