Cost to Own
United States › Oregon › Umatilla County › Climate Station PENDLETON, OR US Distance 9 mi Normals 1991 to 2020
This weather has a price Keeping the median Umatilla County home comfortable runs roughly $399 a year in heating and cooling alone. See where it lands in the monthly bill

30-year climate normals

Umatilla County Climate and Weather Averages

Hottest month: July

89.2°

average daily high. The coldest month is December, averaging a low of 27.5°F.

Umatilla County gets 12.83" of precipitation a year and 15.7" of snow, and 34% of it falls in Nov, Dec, Jan.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 41.7° 28.0° 1.52" 3.8"
February 46.4° 29.6° 1.19" 4.5"
March 55.0° 33.7° 1.33" 0.7"
April 61.8° 38.3° 1.21" 0.0"
May 70.9° 45.0° 1.45" 0.0"
June 78.4° 50.7° 1.05" 0.0"
July 89.2° 56.7° 0.26" 0.0"
August 87.6° 56.0° 0.31" 0.0"
September 78.0° 49.0° 0.53" 0.0"
October 63.5° 39.4° 1.09" 0.1"
November 49.1° 32.3° 1.39" 1.2"
December 40.8° 27.5° 1.50" 5.4"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 34% falling in the wettest three months (Nov, Dec, Jan).

January 1.52"
February 1.19"
March 1.33"
April 1.21"
May 1.45"
June 1.05"
July 0.26"
August 0.31"
September 0.53"
October 1.09"
November 1.39"
December 1.50"
Annual total 12.83"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 636
Heating degree days How much heating the climate demands 5,340
Approximate annual cooling cost At 15.92¢/kWh, Oregon average $101
Approximate annual electric heating cost Lower where heating is gas rather than electric $298

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Umatilla County, where electricity is one line of eight.

Common questions

What is the weather like in Umatilla County?

Umatilla County averages a high of 89.2°F in July and a low of 27.5°F in December. Annual precipitation is 12.83 inches, including 15.7 inches of snow.

When is the rainy season in Umatilla County?

The wettest stretch is Nov, Dec, Jan, which accounts for 34% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Umatilla County?

The average daily high in July, the hottest month, is 89.2°F. That drives 636 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Umatilla County?

Yes. Umatilla County averages 15.7 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals: NOAA National Centers for Environmental Information, 1991 to 2020 Monthly Climate Normals, station PENDLETON, OR US (USW00024155), 9 miles from the county centroid.
  • Heating and cooling degree days: NOAA, same station and period.
  • Annual figures on this page are the sum of that station's twelve monthly normals. NOAA also publishes a separately-computed annual normal, which can differ from the monthly sum by a few percent; we use the monthly series because the month-by-month breakdown above has to come from it.
  • Electricity price: US Energy Information Administration, Electric Power Monthly Table 5.6.A, Oregon residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.