Portland Rainfall Forecast
- No Rain
- 5%
- 10%
- 10%
- 45%
- 70%
- 55%
Portland Rainfall Statistics
September Rainfall
Ionia County Airport (9.3 miles)
Total Rainfall September
1.5inDaily Average September
0.2inWettest Day 4 September, 2026
1.1inWet Days September
4/11 (36%)
Climate (2021–2025)
Ionia County Airport (9.3 miles)
Annual Average 2021–2025
28.6inMonthly Average 2021–2026
2.4inDaily Average 2021–2026
0.1inWettest Day 12 July, 2023
2.6in