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Umatilla (OR) Weather and Climate: A Comprehensive Guide

Umatilla experiences great temperature shifts. The city's weather can transition from very warm days to cold weather. The area is known for its low rain/snowfall. Now, let’s break down all the climate details for a clearer picture.

Average maximum day and minimum night temperature

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 in July, the warmest time of the year, to a chilly 5°C during cooler months like December.

At night, temperatures typically drop to an average of around -3°C during these months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Umatilla is known for its low rain/snowfall, with yearly precipitation amounts around 216 mm. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, December receives moderate snow/rainfall, averaging 35 mm of precipitation, recorded across 15 snowy/rainy days. In contrast, the drier season, July brings less rainfall, with 2.9 mm 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

Forecast for Umatilla (OR)

Sun   Dec 22
8°C | 1°C
NE 2 m/s
0.5 mm
overcast and slight rain

overcast and slight rain

Mon   Dec 23
11°C | 4°C
NE 3 m/s
broken clouds and no rain

broken clouds and no rain

Tue   Dec 24
10°C | 4°C
S 3 m/s
7.1 mm
broken clouds and rain

broken clouds and rain

The best time of year to visit Umatilla in the United States of America

Other facts from our historical weather data:
  • When is summer in Umatilla?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Umatilla?
    July has an average maximum temperature of 32°C and is the warmest month of the year.
  • Which is the coldest month in Umatilla?
    The coldest month is December with an average maximum temperature of 5°C.
  • Which is the wettest month in Umatilla?
    December tops the wettest month list with 35 mm of rainfall.
  • Which is the driest month in Umatilla?
    July is the driest month with 3 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.