Portland (OR)
October
Weather in Portland, Oregon for October 2026
Your guide to Portland weather in October - trends and predictions
In general, the average temperature in Portland at the beginning of October is 21.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.6 °C by the end of October.
Portland experiences heavy rainfall in October, with over 20 rainy days and an average total precipitation 147.3 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
22
Rainy days
0
Snow days
17°/9°
Temperatures
10 km/h
Avg max wind
70 %
Avg humidity
Portland Weather October
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Temperatures trend during October in Portland
See the weather trend as well as the moving average line
October weather in Portland day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 |  Cloudy | 22° /10° | 1.7 mm | 5 | |
| Oct. 2 |  Light rain | 17° /9° | 1.7 mm | 4 | |
| Oct. 3 |  Partly cloudy | 20° /9° | 0 mm | 5 | |
| Oct. 4 |  Mist | 16° /11° | 11.3 mm | 4 | |
| Oct. 5 | Mist | 24° /9° | 0 mm | 5 | |
| Oct. 6 |  Sunny | 27° /11° | 0 mm | 7 | |
| Oct. 7 | Sunny | 27° /12° | 0 mm | 7 | |
| Oct. 8 |  Overcast | 19° /12° | 0 mm | 4 | |
| Oct. 9 |  Light rain shower | 15° /10° | 5.6 mm | 4 | |
| Oct. 10 |  Moderate rain | 17° /9° | 3.5 mm | 4 | |
| Oct. 11 |  Moderate or heavy rain with thunder | 17° /10° | 3.2 mm | 4 | |
| Oct. 12 | Mist | 19° /11° | 10.6 mm | 4 | |
| Oct. 13 | Overcast | 18° /9° | 1.6 mm | 4 | |
| Oct. 14 | Light drizzle | 18° /9° | 1.5 mm | 4 | |
| Oct. 15 | Overcast | 19° /10° | 5.9 mm | 5 | |
| Oct. 16 | Moderate or heavy rain with thunder | 16° /9° | 7.9 mm | 4 | |
| Oct. 17 | Fog | 16° /9° | 0.6 mm | 4 | |
| Oct. 18 | Mist | 17° /8° | 0 mm | 4 | |
| Oct. 19 | Mist | 19° /11° | 3.5 mm | 4 | |
| Oct. 20 | Fog | 18° /10° | 5.5 mm | 4 | |
| Oct. 21 | Fog | 17° /8° | 8.6 mm | 4 | |
| Oct. 22 | Overcast | 17° /10° | 0.1 mm | 4 | |
| Oct. 23 | Overcast | 15° /9° | 0 mm | 4 | |
| Oct. 24 | Light rain | 13° /6° | 13.7 mm | 3 | |
| Oct. 25 |  Patchy light rain with thunder | 13° /6° | 13.3 mm | 3 | |
| Oct. 26 | Patchy rain possible | 11° /7° | 13.9 mm | 3 | |
| Oct. 27 | Fog | 12° /5° | 13.5 mm | 3 | |
| Oct. 28 | Sunny | 13° /6° | 2.7 mm | 3 | |
| Oct. 29 | Sunny | 13° /6° | 2.9 mm | 4 | |
| Oct. 30 | Sunny | 14° /5° | 9.5 mm | 3 | |
| Oct. 31 | Overcast | 12° /5° | 4.9 mm | 3 | |
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Important Notice
Our weather forecast for Portland in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Portland forecast closer to your planned date for the most up-to-date weather information.
Change Month
Portland in October - FAQ
What are the expected maximum and minimum temperatures in Portland during October?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Portland during October?
Significant rainfall exceeding 147.3 mm is expected in Portland during October, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Portland during October?
The average wind speed in Portland during October is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Portland
Explore the daily rainfall trends and prepare for Portlands October weather 💧
Typically, Portland has 22 rainy days in October with a total of 147.3 mm of rainfall.
UV exposure in Portland during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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