Columbia River - Grassy Island Rainfall Forecast

Today 18 Oct
No Rain
Mon 19 Oct
No Rain
Tue 20 Oct
No Rain
Wed 21 Oct
No Rain
Thu 22 Oct
25%
Fri 23 Oct
15%
Sat 24 Oct
25%

Columbia River - Grassy Island Rainfall Statistics

October Rainfall

Astoria, Astoria Regional Airport (18.6 miles)

Total Rainfall 2026
35.4 in
Daily Average 2026
0.1 in
Wettest Day 11 March, 2026
1.9 in
Wet Days 2026
95/291 (33%)
Total Rainfall September
3.4 in
Daily Average September
0.1 in
Wettest Day 3 September, 2026
1.2 in
Wet Days September
10/30 (33%)
Total Rainfall October
0.2 in
Daily Average October
0.01 in
Wettest Day 9 October, 2026
0.2 in
Wet Days October
1/18 (6%)

Climate (2021–2025)

Astoria, Astoria Regional Airport (18.6 miles)

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Annual Average 2021–2025
65.5 in
Monthly Average 2021–2026
5.3 in
Daily Average 2021–2026
0.2 in
Wettest Day 6 January, 2022
5.1 in

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