Columbia River - Ackerman Island Rainfall Forecast

Today 14 Sep
5%
Tue 15 Sep
5%
Wed 16 Sep
No Rain
Thu 17 Sep
No Rain
Fri 18 Sep
No Rain
Sat 19 Sep
No Rain
Sun 20 Sep
No Rain

Columbia River - Ackerman Island Rainfall Statistics

September Rainfall

Portland, Portland-Troutdale Airport (2.5 miles)

Total Rainfall 2026
20in
Daily Average 2026
0.1in
Wettest Day 12 March, 2026
1.8in
Wet Days 2026
77/257 (30%)
Total Rainfall August
0.01in
Daily Average August
0in
Wettest Day 29 August, 2026
0.01in
Wet Days August
1/31 (3%)
Total Rainfall September
0.9in
Daily Average September
0.1in
Wettest Day 6 September, 2026
0.4in
Wet Days September
4/14 (29%)

Climate (2021–2025)

Portland, Portland-Troutdale Airport (2.5 miles)

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Annual Average 2021–2025
39.7in
Monthly Average 2021–2026
3.4in
Daily Average 2021–2026
0.1in
Wettest Day 18 December, 2025
2.3in

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