Portland Rainfall Forecast

Today 8 Sep
10%
Wed 9 Sep
20%
Thu 10 Sep
75%
Fri 11 Sep
15%
Sat 12 Sep
No Rain
Sun 13 Sep
20%
Mon 14 Sep
10%

Portland Rainfall Statistics

September Rainfall

Portland, Portland International Jetport (2.5 miles)

Total Rainfall 2026
26.9in
Daily Average 2026
0.1in
Wettest Day 14 May, 2026
2in
Wet Days 2026
94/251 (37%)
Total Rainfall August
2.7in
Daily Average August
0.1in
Wettest Day 13 August, 2026
1.4in
Wet Days August
7/31 (23%)
Total Rainfall September
0.1in
Daily Average September
0.01in
Wettest Day 3 September, 2026
0.1in
Wet Days September
2/8 (25%)

Climate (2021–2025)

Portland, Portland International Jetport (2.5 miles)

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Annual Average 2021–2025
46.1in
Monthly Average 2021–2026
3.9in
Daily Average 2021–2026
0.1in
Wettest Day 14 October, 2022
2.8in

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