Weather in Portland in October 2025
Average weather
Average temperature in Portland in October
The temperature in October is +66°F on average, with a range between a maximum of +84°F during the day and a minimum of +34°F at night.
The average maximum temperature goes down 14% by the end of the month, compared with the beginning of the month, from +68°F to +61°F.
Is Portland warm or cold in October?
Portland is typically mild in October.
Maximum temperatures go down compared to the previous month from +77°F to +64°F. The minimum temperature also goes down from +54°F to +46°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how October is compared to other months in Portland:
Climate in Portland in October
| September | October | November | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +77°F | +64°F | +52°F | ||||
| Min. temperature | ||||||
| +37°F | +28°F | +10°F | ||||
| Max. temperature | ||||||
| +106°F | +90°F | +70°F | ||||
| Rainfall | ||||||
| 49 mm | 105 mm | 180 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 2 m/s | ||||
| Humidity | ||||||
| 68% | 78% | 84% | ||||
| Air pressure | ||||||
| 1015 HPa | 1017 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 10 | 5 | 2 | ||||
| Cloudy days | ||||||
| 10 | 9 | 7 | ||||
| Rainy days | ||||||
| 10 | 16 | 20 | ||||
| Snowy days | ||||||
| 0 | 0 | 1 | ||||
October typically has worse weather conditions compared to September. It’s getting colder in October. From +77°F in the day, the average maximum temperature lowers to +64°F. Prepare for more rain. Average rainfall goes from 49 mm to 105 mm. Humidity rises from 68% to 78%. The average wind speed doesn’t change much during October, staying around 1 m/s. The days becoming less sunny, going from 10 sunny days in September to 5 in October.
November brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Portland is gradually increasing during October, going from 2 m/s to 4 m/s over the course of the month.
Rain
How was the weather last October in Portland?
Climate Change Over the Years
The climate in Portland in October has not changed that much over the last 43 years.
The average temperature was the lowest in 2011 (+61°F) and the highest in 2015 (+67°F). The driest year was 1985 with only 736 mm of rainfall, and the wettest year was 2021 with 4296 mm.
FAQ
Is October a good time to visit Portland?
Can you sunbathe in Portland in October?
Is Portland rainy in October?
Is it sunny in Portland in October?
Other cities in USA
Monthly weather in Portland
Source of the data
For this page, we’ve looked at the typical weather in Portland, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.