Multnomah County (Portland)
October
Weather in Multnomah County for October 2025
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 22.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.7 °F by the end of October.
Multnomah County in October brings notable rainfall, with an average of 18 rainy days and a total precipitation of 140 mm.
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Temperatures
Rain 🌧️
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13
Dry days
18
Rainy days
0
Snow days
18°/9°
Temperatures
9 km/h
Avg max wind
69 %
Avg humidity
Multnomah County in October average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2  15° | 3  21° | 4  16° | 5 24° | ||
| 6  28° | 7 27° | 8 22° | 9 16° | 10  17° | 11  20° | 12 23° |
| 13  22° | 14 17° | 15 18° | 16 16° | 17 17° | 18 19° | 19 22° |
| 20 20° | 21 16° | 22 16° | 23 14° | 24 13° | 25  13° | 26 12° |
| 27 13° | 28 13° | 29 13° | 30 13° | 31 12° |
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Temperatures trend during October in Multnomah County
See the weather trend as well as the moving average line
October weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 | Cloudy | 24° /9° | 0 mm | 6 | |
| Oct. 2 | Light rain | 15° /8° | 2.5 mm | 4 | |
| Oct. 3 | Patchy rain possible | 21° /9° | 0 mm | 5 | |
| Oct. 4 | Mist | 16° /10° | 17 mm | 4 | |
| Oct. 5 | Mist | 24° /9° | 0 mm | 6 | |
| Oct. 6 | Sunny | 28° /12° | 0 mm | 8 | |
| Oct. 7 | Sunny | 27° /13° | 0 mm | 7 | |
| Oct. 8 | Cloudy | 22° /13° | 0 mm | 5 | |
| Oct. 9 | Light rain shower | 16° /11° | 8.4 mm | 4 | |
| Oct. 10 | Moderate rain | 17° /9° | 4.3 mm | 4 | |
| Oct. 11 | Moderate or heavy rain with thunder | 20° /11° | 4.8 mm | 5 | |
| Oct. 12 | Mist | 23° /12° | 0.1 mm | 5 | |
| Oct. 13 | Overcast | 22° /11° | 0.3 mm | 6 | |
| Oct. 14 | Light drizzle | 17° /11° | 2.2 mm | 4 | |
| Oct. 15 | Overcast | 18° /12° | 8.8 mm | 5 | |
| Oct. 16 | Moderate or heavy rain with thunder | 16° /11° | 11.9 mm | 4 | |
| Oct. 17 | Fog | 17° /9° | 1 mm | 4 | |
| Oct. 18 | Mist | 19° /8° | 0 mm | 5 | |
| Oct. 19 | Mist | 22° /11° | 0 mm | 5 | |
| Oct. 20 | Fog | 20° /11° | 8.2 mm | 5 | |
| Oct. 21 | Fog | 16° /10° | 12.9 mm | 4 | |
| Oct. 22 | Patchy rain possible | 16° /11° | 0.2 mm | 4 | |
| Oct. 23 | Patchy rain possible | 14° /8° | 0 mm | 4 | |
| Oct. 24 | Light rain | 13° /4° | 3.8 mm | 3 | |
| Oct. 25 | Patchy light rain with thunder | 13° /5° | 5.9 mm | 3 | |
| Oct. 26 | Patchy rain possible | 12° /8° | 4 mm | 3 | |
| Oct. 27 | Fog | 13° /5° | 20.3 mm | 3 | |
| Oct. 28 | Sunny | 13° /5° | 4.1 mm | 4 | |
| Oct. 29 | Sunny | 13° /5° | 0 mm | 4 | |
| Oct. 30 | Sunny | 13° /5° | 14.3 mm | 4 | |
| 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.
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 18° 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 140 mm is expected in Multnomah County during October, occurring over more than 18 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 9 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 💧
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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