Umatilla County (Pendleton)
October
Weather in Umatilla County, Oregon for October 2026
Your guide to Umatilla County weather in October - trends and predictions
In general, the average temperature in Umatilla County at the beginning of October is 20.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.1 °F by the end of October.
Umatilla County experiences moderate rainfall in October, with an average of 10 rainy days and a total precipitation of 35 mm.
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Temperatures
Rain 🌧️
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21
Dry days
10
Rainy days
0
Snow days
18°/7°
Temperatures
16 km/h
Avg max wind
56 %
Avg humidity
Umatilla County Weather October
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Temperatures trend during October in Umatilla County
See the weather trend as well as the moving average line
October weather in Umatilla County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 |  Overcast | 19° /14° | 0 mm | 4 | |
| Oct. 2 |  Light rain | 16° /12° | 1.2 mm | 4 | |
| Oct. 3 |  Sunny | 20° /8° | 0 mm | 5 | |
| Oct. 4 |  Moderate rain at times | 18° /7° | 0.6 mm | 4 | |
| Oct. 5 | Sunny | 20° /6° | 0 mm | 6 | |
| Oct. 6 | Sunny | 22° /7° | 0 mm | 6 | |
| Oct. 7 | Sunny | 26° /8° | 0 mm | 7 | |
| Oct. 8 | Sunny | 22° /9° | 0 mm | 6 | |
| Oct. 9 | Overcast | 20° /9° | 0 mm | 5 | |
| Oct. 10 | Overcast | 19° /9° | 0 mm | 5 | |
| Oct. 11 | Overcast | 18° /8° | 0 mm | 5 | |
| Oct. 12 |  Partly cloudy | 15° /8° | 0 mm | 5 | |
| Oct. 13 | Sunny | 18° /7° | 0 mm | 5 | |
| Oct. 14 | Overcast | 17° /5° | 0 mm | 5 | |
| Oct. 15 | Overcast | 17° /7° | 0.1 mm | 5 | |
| Oct. 16 | Overcast | 17° /5° | 2.8 mm | 4 | |
| Oct. 17 |  Patchy rain possible | 14° /6° | 0.2 mm | 4 | |
| Oct. 18 | Sunny | 14° /3° | 0 mm | 4 | |
| Oct. 19 | Partly cloudy | 18° /9° | 3 mm | 5 | |
| Oct. 20 | Overcast | 20° /7° | 0 mm | 5 | |
| Oct. 21 | Moderate or heavy rain shower | 16° /6° | 3.7 mm | 4 | |
| Oct. 22 | Overcast | 16° /5° | 0 mm | 4 | |
| Oct. 23 | Overcast | 13° /6° | 0 mm | 4 | |
| Oct. 24 |  Cloudy | 16° /4° | 1.5 mm | 4 | |
| Oct. 25 | Partly cloudy | 14° /4° | 2.4 mm | 4 | |
| Oct. 26 | Sunny | 14° /5° | 2.5 mm | 4 | |
| Oct. 27 |  Heavy rain at times | 13° /6° | 1.9 mm | 4 | |
| Oct. 28 | Patchy rain possible | 14° /3° | 1.4 mm | 4 | |
| Oct. 29 | Patchy rain possible | 13° /5° | 0.2 mm | 4 | |
| Oct. 30 | Heavy rain at times | 12° /0° | 3.8 mm | 3 | |
| Oct. 31 | Light rain | 12° /5° | 6.7 mm | 3 | |
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Important Notice
Our weather forecast for Umatilla 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 Umatilla County forecast closer to your planned date for the most up-to-date weather information.
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Umatilla County in October - FAQ
What are the expected maximum and minimum temperatures in Umatilla County during October?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Umatilla County during October?
In October, Umatilla County can expect light to moderate rainfall, totaling 35 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Umatilla County during October?
The average wind speed in Umatilla County during October is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Umatilla County
Explore the daily rainfall trends and prepare for Umatilla Countys October weather 💧
Typically, Umatilla County has 10 rainy days in October with a total of 35 mm of rainfall.
UV exposure in Umatilla County during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Where is Umatilla County?Get accurate weather forecasts for Umatilla County, located at latitude 45.672 and longitude -118.789. Stay updated with localized weather information tailored for Umatilla County.
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