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United States › Oregon › Yamhill County › Climate Station MCMINNVILLE MUNI AP, OR US Distance 9.6 mi Normals 1991–2020

30-year climate normals

Yamhill County Climate and Weather Averages

Hottest month — August

83.1°

average daily high. The coldest month is December, averaging a low of 34.4°F.

Yamhill County gets 37.64" of precipitation a year, and 47% 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 Precip
January 47.3° 35.2° 5.51"
February 51.0° 35.3° 4.08"
March 55.7° 37.1° 4.17"
April 60.5° 39.7° 2.99"
May 68.0° 44.3° 1.99"
June 73.7° 48.3° 1.32"
July 82.7° 51.9° 0.25"
August 83.1° 51.9° 0.36"
September 77.0° 48.2° 1.30"
October 64.0° 42.3° 3.48"
November 52.6° 37.9° 5.74"
December 46.5° 34.4° 6.45"

Rainfall by month

Yamhill County has a distinct wet season. 47% of the year's precipitation arrives in Nov, Dec, Jan.

January 5.51"
February 4.08"
March 4.17"
April 2.99"
May 1.99"
June 1.32"
July 0.25"
August 0.36"
September 1.30"
October 3.48"
November 5.74"
December 6.45"
Annual total 37.64"

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 284
Heating degree days How much heating the climate demands 4,694
Approximate annual cooling cost At 16.27¢/kWh, Oregon average $46
Approximate annual electric heating cost Lower where heating is gas rather than electric $267

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 Yamhill County, where electricity is one line of eight.

Common questions

What is the weather like in Yamhill County?

Yamhill County averages a high of 83.1°F in August and a low of 34.4°F in December. Annual precipitation is 37.64 inches, with essentially no snow.

When is the rainy season in Yamhill County?

The wettest stretch is Nov, Dec, Jan, which accounts for 47% of the year's precipitation. That is a pronounced wet season rather than rain spread evenly through the year.

How hot does it get in Yamhill County?

The average daily high in August, the hottest month, is 83.1°F. That drives 284 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Yamhill County?

Effectively no. Measurable snowfall is rare in Yamhill County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station MCMINNVILLE MUNI AP, OR US (USW00094273), 9.6 miles from the county centroid.
  • Heating and cooling degree days — NOAA, same station and period.
  • 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.