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United States weather

Weather in Umatilla County, Oregon for August 2027

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

    Rain 🌧️

  • Precipitation in Umatilla County during August is a rare event, with an average of fewer than 2 rainy days.

    • More

  • Is August a good time to visit Umatilla County? check out the best time to travel to Umatilla County page.

  • ✨ Is August a good time to visit Umatilla County? – Ask the AI Weatherman

Average dry days
30
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/16°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
36 %
Avg humidity

Umatilla County Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Heavy rain at times
27°
2
Sunny
30°
3
Partly cloudy
29°
4
Overcast
28°
5
Overcast
31°
6
Overcast
30°
7
Partly cloudy
32°
8
Sunny
32°
9
Cloudy
33°
10
Sunny
33°
11
Sunny
36°
12
Sunny
35°
13
Sunny
32°
14
Sunny
30°
15
Partly cloudy
30°
16
Overcast
28°
17
Partly cloudy
31°
18
Sunny
32°
19
Sunny
32°
20
Sunny
33°
21
Sunny
35°
22
Sunny
33°
23
Cloudy
33°
24
Sunny
35°
25
Partly cloudy
37°
26
Overcast
34°
27
Overcast
30°
28
Sunny
32°
29
Sunny
30°
30
Sunny
31°
31
Sunny
34°

Temperatures trend during August in Umatilla County

See the weather trend as well as the moving average line

August weather in Umatilla County day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Heavy rain at times
Heavy rain at times
 27° /17° 9.6 mm 8
Aug. 2 Sunny
Sunny
 30° /14° 0 mm 9
Aug. 3 Partly cloudy
Partly cloudy
 29° /13° 0 mm 9
Aug. 4 Overcast
Overcast
 28° /12° 0 mm 8
Aug. 5 Overcast
Overcast
 31° /12° 0 mm 8
Aug. 6 Overcast
Overcast
 30° /15° 0 mm 8
Aug. 7 Partly cloudy
Partly cloudy
 32° /17° 0 mm 8.9
Aug. 8 Sunny
Sunny
 32° /14° 0 mm 8.9
Aug. 9 Cloudy
Cloudy
 33° /16° 0 mm 8.8
Aug. 10 Sunny
Sunny
 33° /17° 0 mm 8.8
Aug. 11 Sunny
Sunny
 36° /17° 0 mm 8.7
Aug. 12 Sunny
Sunny
 35° /18° 0 mm 8.6
Aug. 13 Sunny
Sunny
 32° /18° 0 mm 8.6
Aug. 14 Sunny
Sunny
 30° /16° 0 mm 8
Aug. 15 Partly cloudy
Partly cloudy
 30° /16° 0 mm 8
Aug. 16 Overcast
Overcast
 28° /18° 0 mm 7
Aug. 17 Partly cloudy
Partly cloudy
 31° /17° 0 mm 5
Aug. 18 Sunny
Sunny
 32° /16° 0 mm 8
Aug. 19 Sunny
Sunny
 32° /16° 0 mm 8.1
Aug. 20 Sunny
Sunny
 33° /15° 0 mm 8
Aug. 21 Sunny
Sunny
 35° /17° 0 mm 5
Aug. 22 Sunny
Sunny
 33° /18° 0 mm 7.9
Aug. 23 Cloudy
Cloudy
 33° /16° 0 mm 7.8
Aug. 24 Sunny
Sunny
 35° /17° 0 mm 7.7
Aug. 25 Partly cloudy
Partly cloudy
 37° /18° 0 mm 7.6
Aug. 26 Overcast
Overcast
 34° /18° 0 mm 6
Aug. 27 Overcast
Overcast
 30° /20° 0 mm 7
Aug. 28 Sunny
Sunny
 32° /15° 0 mm 7.4
Aug. 29 Sunny
Sunny
 30° /16° 0 mm 7.3
Aug. 30 Sunny
Sunny
 31° /14° 0 mm 7.2
Aug. 31 Sunny
Sunny
 34° /15° 0 mm 7.1
Next
Important Notice
Our weather forecast for Umatilla County in August 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 August - FAQ

What are the expected maximum and minimum temperatures in Umatilla County during August?
Expect warm days with temperatures around 32°, cooling to mild conditions of 16° after sunset. Perfect for those who enjoy warm weather.

How much rainfall should be expected in Umatilla County during August?
Rainfall in Umatilla County during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.

What are the typical wind conditions in Umatilla County during August?
The average wind speed in Umatilla County during August is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Umatilla County

Explore the daily rainfall trends and prepare for Umatilla Countys August weather 💧
Typically, Umatilla County has 1 rainy days in August with a total of 9.6 mm of rainfall.

UV exposure in Umatilla County during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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