Umatilla (OR) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Umatilla.
Climate overview of Umatilla
Temperatures in Umatilla, Oregon, United States of America, vary greatly throughout the year. July is the hottest month at 32°C (90°F), while December is the coldest at 5°C (41°F).
Rain/snowfall is extremely rare, with only 216 mm (8.5 in) falling across the entire year.
Umatilla Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Umatilla — and find the best time to visit.
Monthly Temperature in Umatilla
The climate in Umatilla is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a very warm 32°C (90°F) in July, the warmest time of the year, to a chilly 5°C (41°F) during cooler months like December.
At night, you can expect temperatures ranging from 16°C (61°F) in July to around -3°C (27°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Umatilla
Umatilla is known for its low rain/snowfall, with yearly precipitation amounts around 216 mm (8.5 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate snow/rainfall, averaging 35 mm (1.4 in) of precipitation, recorded across 15 snowy/rainy days. In contrast, the driest month July brings less rainfall, with 2.9 mm (0.1 in) over 2 rainy days. For more details, please visit our Umatilla Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Umatilla
Frequently asked questions about the climate in Umatilla
What is the best time to visit Umatilla?
April, May, June, September and October typically offer the most optimal weather in Umatilla. In contrast, December tends to have less optimal conditions. Umatilla has a distinct dry season from January to December.
What temperatures can I expect in Umatilla?
Daytime highs range from 5°C (41°F) in December to 32°C (90°F) in July. Nighttime lows range from -3°C (27°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Umatilla get?
Annual rainfall is around 216 mm (8.5 in). December is the wettest month with 35 mm (1.4 in), while July is the driest with 2.9 mm (0.1 in). In the coldest months, precipitation may fall as snow/rain.
Umatilla 3-Day Forecast
Umatilla (OR) 3-Day Forecast
Umatilla on the map
Umatilla is highlighted — select any city to see its climate.
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