Portland Weather in October
United States · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
October in Portland sees average temperatures ranging from a low of 8.7°C (47.7°F) to a high of 17.7°C (63.9°F), with a mean of 12.7°C (54.9°F). Compared to the annual average of 11.9°C (53.4°F), this month is 0.8°C warmer than the yearly norm. Precipitation averages 111.8mm, making it approximately 8.0mm drier than the monthly average of 120.0mm. The city receives an average of 7.0 hours of sunshine per day during October, with relative humidity averaging 78.7%. Wind speeds reach an average maximum of 15.6 km/h. For travelers, this month offers a temperature experience in Portland, with drier-than-average conditions compared to the rest of the year.
Portland's climate is similar to Seattle but with slightly warmer summers and cooler winters. I visited during the famous rose festival in June and found the weather ideal. The data shows that the best time to visit is June to September, when the rainfall is minimal and the city's famous outdoor culture thrives. The winter months are grey and wet but the city's coffee shop culture makes it cozy.
October vs Adjacent Months
| Metric | September | October | November |
|---|---|---|---|
| Mean Temp | 18.3°C (64.9°F) | 12.7°C (54.9°F) | 7.1°C (44.8°F) |
| Rainfall | 65.2mm | 111.8mm | 220.8mm |
| Sunshine | 10.0 hrs | 7.0 hrs | 4.8 hrs |
| Humidity | 66.4% | 78.7% | 84.4% |
| Wind | 15.3 km/h | 15.6 km/h | 19.1 km/h |
| Rainy Days | 9.4 | 14.4 | 20.0 |
| Snowfall | 0.0 cm | 0.0 cm | 1.5 cm |
Seasonal Context
October falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Portland in October, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Portland in October?
The average temperature in Portland during October ranges from 8.7°C (47.7°F) to 17.7°C (63.9°F), with a mean of 12.7°C (54.9°F).
How much does it rain in Portland in October?
Portland receives an average of 111.8mm of precipitation in October, spread across approximately 14.4 rainy days.
What should I pack for Portland in October?
Based on October weather data, pack warm layers, a medium jacket, and waterproof outerwear. Rain gear is essential — this month averages 111.8mm of precipitation.
Is October a good time to visit Portland?
October is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Portland
Cities with Similar October Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 45.52°, -122.68°. Timezone: America/Los_Angeles. Last updated: 2026-07-30.