Multnomah County (Portland)
October
Weather in Multnomah County, Oregon for October 2026
Your guide to Multnomah County weather in October - trends and predictions
In general, the average temperature in Multnomah County 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.
Multnomah County 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
Multnomah County Weather October
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Temperatures trend during October in Multnomah County
See the weather trend as well as the moving average line
October weather in Multnomah County 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 Multnomah County 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 Multnomah County forecast closer to your planned date for the most up-to-date weather information.
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Multnomah County in October - FAQ
What are the expected maximum and minimum temperatures in Multnomah County 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 Multnomah County during October?
Significant rainfall exceeding 147.3 mm is expected in Multnomah County during October, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Multnomah County during October?
The average wind speed in Multnomah County during October is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Multnomah County
Explore the daily rainfall trends and prepare for Multnomah Countys October weather 💧
Typically, Multnomah County has 22 rainy days in October with a total of 147.3 mm of rainfall.
UV exposure in Multnomah County during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Where is Multnomah County?Get accurate weather forecasts for Multnomah County, located at latitude 45.523 and longitude -122.676. Stay updated with localized weather information tailored for Multnomah County.
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