Portland-Hillsboro Airport Rainfall Forecast

Today 15 Sep
10%
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
Mon 21 Sep
5%

Portland-Hillsboro Airport Rainfall Statistics

September Rainfall

Portland-Hillsboro Airport (0 miles)

Total Rainfall 2026
16.6in
Daily Average 2026
0.1in
Wettest Day 11 March, 2026
1.4in
Wet Days 2026
71/258 (28%)
Total Rainfall August
0in
Daily Average August
0in
Wettest Day 1 August, 2026
0in
Wet Days August
–
Total Rainfall September
0.6in
Daily Average September
0.1in
Wettest Day 6 September, 2026
0.2in
Wet Days September
5/15 (33%)

Climate (2021–2025)

Portland-Hillsboro Airport (0 miles)

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Annual Average 2021–2025
34.4in
Monthly Average 2021–2026
2.9in
Daily Average 2021–2026
0.1in
Wettest Day 26 December, 2022
2.5in

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