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United States › Washington › Grays Harbor County › Climate Station HOQUIAM BOWERMAN AP, WA US Distance 10.9 mi Normals 1991–2020

30-year climate normals

Grays Harbor County Climate and Weather Averages

Hottest month — August

68.1°

average daily high. The coldest month is December, averaging a low of 37.3°F.

Grays Harbor County gets 68.76" 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° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low Precip
January 47.5° 38.0° 10.91"
February 49.6° 37.6° 6.65"
March 52.2° 39.3° 7.74"
April 55.6° 41.9° 5.35"
May 60.1° 46.6° 2.99"
June 63.4° 50.8° 2.01"
July 67.0° 53.7° 0.85"
August 68.1° 53.9° 1.35"
September 67.0° 51.2° 2.53"
October 59.5° 45.5° 6.91"
November 51.6° 40.3° 10.95"
December 46.7° 37.3° 10.52"

Rainfall by month

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

January 10.91"
February 6.65"
March 7.74"
April 5.35"
May 2.99"
June 2.01"
July 0.85"
August 1.35"
September 2.53"
October 6.91"
November 10.95"
December 10.52"
Annual total 68.76"

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 26
Heating degree days How much heating the climate demands 5,114
Approximate annual cooling cost At 14.95¢/kWh, Washington average $4
Approximate annual electric heating cost Lower where heating is gas rather than electric $268

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 Grays Harbor County, where electricity is one line of eight.

Common questions

What is the weather like in Grays Harbor County?

Grays Harbor County averages a high of 68.1°F in August and a low of 37.3°F in December. Annual precipitation is 68.76 inches, with essentially no snow.

When is the rainy season in Grays Harbor 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 Grays Harbor County?

The average daily high in August, the hottest month, is 68.1°F. That drives 26 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Grays Harbor County?

Effectively no. Measurable snowfall is rare in Grays Harbor County.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station HOQUIAM BOWERMAN AP, WA US (USW00094225), 10.9 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, Washington residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.