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United States weather

Weather in Umatilla County, Oregon for October 2025

Your guide to Umatilla County weather in October - trends and predictions

    Temperatures

  • Until now, October 2025 in Umatilla County is slightly cooler than the historical average by -1.8 °F.

  • Expect cooler weather in the next days in Umatilla County with the forecast suggesting a temperature of 13 °F, lower than the historical average.

  • 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 11.7 °F by the end of October.

    • Rain 🌧️

  • Umatilla County experiences moderate rainfall in October, with an average of 10 rainy days and a total precipitation of 35 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
21
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/7°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
56 %
Avg humidity

Umatilla County Weather October

Move between months or click on a day
September
November
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
19°
2
Light rain
16°
3
Sunny
20°
4
Moderate rain at times
18°
5
Sunny
20°
6
Sunny
22°
7
Sunny
26°
8
Sunny
22°
9
Overcast
20°
10
Overcast
19°
11
Overcast
18°
12
Partly cloudy
15°
13
Sunny
18°
14
Overcast
17°
15
Overcast
17°
16
Overcast
17°
17
Patchy rain possible
14°
18
Sunny
14°
19
Partly cloudy
18°
20
Overcast
20°
21
Moderate or heavy rain shower
14°
22
Sunny
19°
23
Partly cloudy
16°
24
Cloudy
22°
25
Patchy rain possible
16°
26
Patchy rain possible
11°
27
Cloudy
11°
28
Patchy rain possible
8°
29
Cloudy
13°
30
Partly cloudy
12°
31
Patchy rain possible
11°

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

Click on a date for more information
September November
Date Weather Temperatures Rain UV More
Oct. 1 Overcast
Overcast
 19° /14° 0 mm 4
Oct. 2 Light rain
Light rain
 16° /12° 1.2 mm 4
Oct. 3 Sunny
Sunny
 20° /8° 0 mm 5
Oct. 4 Moderate rain at times
Moderate rain at times
 18° /7° 0.6 mm 4
Oct. 5 Sunny
Sunny
 20° /6° 0 mm 6
Oct. 6 Sunny
Sunny
 22° /7° 0 mm 6
Oct. 7 Sunny
Sunny
 26° /8° 0 mm 7
Oct. 8 Sunny
Sunny
 22° /9° 0 mm 6
Oct. 9 Overcast
Overcast
 20° /9° 0 mm 5
Oct. 10 Overcast
Overcast
 19° /9° 0 mm 5
Oct. 11 Overcast
Overcast
 18° /8° 0 mm 5
Oct. 12 Partly cloudy
Partly cloudy
 15° /8° 0 mm 5
Oct. 13 Sunny
Sunny
 18° /7° 0 mm 5
Oct. 14 Overcast
Overcast
 17° /5° 0 mm 5
Oct. 15 Overcast
Overcast
 17° /7° 0.1 mm 5
Oct. 16 Overcast
Overcast
 17° /5° 2.8 mm 4
Oct. 17 Patchy rain possible
Patchy rain possible
 14° /6° 0.2 mm 4
Oct. 18 Sunny
Sunny
 14° /3° 0 mm 4
Oct. 19 Partly cloudy
Partly cloudy
 18° /9° 3 mm 5
Oct. 20 Overcast
Overcast
 20° /7° 0 mm 5
Oct. 21 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /9° 7.4 mm 3
Oct. 22 Sunny
Sunny
 19° /5° 0 mm 0.5
Oct. 23 Partly cloudy
Partly cloudy
 16° /8° 0 mm 0.5
Oct. 24 Cloudy
Cloudy
 22° /8° 0 mm 0
Oct. 25 Patchy rain possible
Patchy rain possible
 16° /8° 3.7 mm 3
Oct. 26 Patchy rain possible
Patchy rain possible
 11° /6° 0.1 mm 2
Oct. 27 Cloudy
Cloudy
 11° /5° 0 mm 2
Oct. 28 Patchy rain possible
Patchy rain possible
 8° /5° 1 mm 2
Oct. 29 Cloudy
Cloudy
 13° /6° 0 mm 2
Oct. 30 Partly cloudy
Partly cloudy
 12° /7° 0 mm 3
Oct. 31 Patchy rain possible
Patchy rain possible
 11° /6° 0.5 mm 2
Next
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 💧

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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Pendleton
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Location coordinates 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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