Umatilla County (Pendleton)
May
Weather in Umatilla County, Oregon for May 2027
Your guide to Umatilla County weather in May - trends and predictions
With an average of 4 rainy days, Umatilla County experiences minimal rainfall in May.
Is May a good time to visit Umatilla County? check out the best time to travel to Umatilla County page.
✨ Is May a good time to visit Umatilla County? – Ask the AI Weatherman
Rain 🌧️
More
27
Dry days
4
Rainy days
0
Snow days
21°/9°
Temperatures
22 km/h
Avg max wind
55 %
Avg humidity
Umatilla County Weather May
Move between months or click on a day
Temperatures trend during May in Umatilla County
See the weather trend as well as the moving average line
May weather in Umatilla County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 24° /7° | 0 mm | 7 | |
| May 2 | Sunny | 26° /10° | 0 mm | 7 | |
| May 3 |  Patchy rain possible | 21° /10° | 0.3 mm | 6 | |
| May 4 |  Partly cloudy | 21° /8° | 0 mm | 6 | |
| May 5 | Sunny | 23° /9° | 0 mm | 7 | |
| May 6 | Sunny | 24° /10° | 0 mm | 7 | |
| May 7 | Sunny | 24° /10° | 0 mm | 8 | |
| May 8 | Partly cloudy | 20° /9° | 0.1 mm | 7 | |
| May 9 |  Overcast | 23° /9° | 0 mm | 7 | |
| May 10 | Overcast | 24° /12° | 0 mm | 7 | |
| May 11 |  Light rain | 20° /9° | 3 mm | 6 | |
| May 12 | Patchy rain possible | 21° /8° | 0.2 mm | 6 | |
| May 13 | Patchy rain possible | 17° /8° | 2.4 mm | 5 | |
| May 14 | Overcast | 17° /8° | 0.1 mm | 6 | |
| May 15 |  Cloudy | 17° /6° | 0.1 mm | 6 | |
| May 16 | Overcast | 15° /7° | 0.8 mm | 4 | |
| May 17 |  Moderate or heavy rain shower | 17° /6° | 6.8 mm | 6 | |
| May 18 | Patchy rain possible | 17° /6° | 0.2 mm | 6 | |
| May 19 | Patchy rain possible | 19° /5° | 0.6 mm | 6 | |
| May 20 | Patchy rain possible | 19° /9° | 0.3 mm | 7 | |
| May 21 | Partly cloudy | 17° /6° | 0 mm | 5 | |
| May 22 | Overcast | 23° /10° | 0.3 mm | 6 | |
| May 23 | Partly cloudy | 24° /10° | 0 mm | 8 | |
| May 24 | Cloudy | 26° /11° | 0 mm | 8 | |
| May 25 | Sunny | 27° /12° | 0 mm | 8 | |
| May 26 | Light rain | 17° /10° | 2.5 mm | 4 | |
| May 27 | Partly cloudy | 23° /8° | 0 mm | 5 | |
| May 28 | Patchy rain possible | 29° /13° | 1.8 mm | 8 | |
| May 29 | Cloudy | 21° /13° | 0 mm | 7 | |
| May 30 | Partly cloudy | 24° /9° | 0 mm | 8 | |
| May 31 | Partly cloudy | 27° /11° | 0 mm | 8 | |
| Next | |||||
Important Notice
Our weather forecast for Umatilla County in May 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.
Change Month
Umatilla County in May - FAQ
What are the expected maximum and minimum temperatures in Umatilla County during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Umatilla County during May?
Expect minimal rainfall in Umatilla County during May, with a total of 19.4 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Umatilla County during May?
The average wind speed in Umatilla County during May is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Umatilla County
Explore the daily rainfall trends and prepare for Umatilla Countys May weather 💧
Typically, Umatilla County has 4 rainy days in May with a total of 19.4 mm of rainfall.
UV exposure in Umatilla County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Top locations in Umatilla County
Select a location for an accurate weather forecast
More Locations Quick links
More Umatilla County weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.