Portland, Oregon weather in October

Averages from 2021–2025 (155 days of record).

Average high: 63°F
Average low: 48°F
Rainy days: ~13 per month
Total precipitation: 5.3 in
Warmest recorded: 85°F
Coldest recorded: 35°F

Expect October days in Portland, Oregon to top out around 63°F and cool to about 48°F overnight, with roughly 13 days of measurable rain across the month. In recent years October has ranged from 35°F to 85°F.

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Current Portland, Oregon forecast → · Historical data by Open-Meteo (ERA5).