Portland Airport Rainfall Forecast

Today 1 May
5%< 1mm
Sat 2 May
95%5–10mm
Sun 3 May
85%1–5mm
Mon 4 May
95%10–15mm
Tue 5 May
70%< 2mm
Wed 6 May
85%1–5mm
Thu 7 May
65%1–5mm

Portland Airport Rainfall Statistics View More

May Rainfall

Portland Airport (0km)

Total Rainfall 2026
148.6mm
Daily Average 2026
1.2mm
Wettest Day 10 April, 2026
18.8mm
Wet Days 2026
46/121 (38%)
Total Rainfall April
66.2mm
Daily Average April
2.2mm
Wettest Day 10 April, 2026
18.8mm
Wet Days April
16/30 (53%)
Total Rainfall May
–
Daily Average May
–
Wettest Day 30 April, 2026
–
Wet Days May
–

Climate (2010–Present)

Portland Airport (0km)

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Annual Average 2021–2025
811mm
Monthly Average 2021–2026
66.9mm
Daily Average 2021–2026
2.3mm
Wettest Day 1 December, 2024
58.8mm

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