Columbia River - Westport Slough Entrance Rainfall Forecast

Today 28 Sep
10%
Tue 29 Sep
75%
Wed 30 Sep
No Rain
Thu 1 Oct
No Rain
Fri 2 Oct
No Rain
Sat 3 Oct
No Rain
Sun 4 Oct
No Rain

Columbia River - Westport Slough Entrance Rainfall Statistics

September Rainfall

Southwest Washington Regional Airport (23 miles)

Total Rainfall 2026
16.1in
Daily Average 2026
0.1in
Wettest Day 13 March, 2026
1.6in
Wet Days 2026
63/271 (23%)
Total Rainfall August
0in
Daily Average August
0in
Wettest Day 1 August, 2026
0in
Wet Days August
–
Total Rainfall September
1.1in
Daily Average September
0.04in
Wettest Day 24 September, 2026
0.6in
Wet Days September
5/28 (18%)

Climate (2021–2025)

Southwest Washington Regional Airport (23 miles)

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Annual Average 2021–2025
39.7in
Monthly Average 2021–2026
3.2in
Daily Average 2021–2026
0.1in
Wettest Day 4 November, 2022
4.2in

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