Portland Rainfall Forecast

Today 26 Sep
85%
Sun 27 Sep
15%
Mon 28 Sep
95%
Tue 29 Sep
90%
Wed 30 Sep
5%
Thu 1 Oct
10%
Fri 2 Oct
10%

Portland Rainfall Statistics

September Rainfall

Grand Forks, Grand Forks International Airport (32.3 miles)

Total Rainfall 2026
16.3in
Daily Average 2026
0.1in
Wettest Day 3 June, 2026
1.9in
Wet Days 2026
72/269 (27%)
Total Rainfall August
2.7in
Daily Average August
0.1in
Wettest Day 3 August, 2026
1.1in
Wet Days August
10/31 (32%)
Total Rainfall September
3.4in
Daily Average September
0.1in
Wettest Day 6 September, 2026
1.2in
Wet Days September
9/26 (35%)

Climate (2021–2025)

Grand Forks, Grand Forks International Airport (32.3 miles)

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Annual Average 2021–2025
19.4in
Monthly Average 2021–2026
1.6in
Daily Average 2021–2026
0.1in
Wettest Day 29 August, 2024
2.4in

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