30-year climate normals

Coos County Climate and Weather Averages

Hottest month — August

73.6°

average daily high. The coldest month is December, averaging a low of 36.4°F.

Coos County gets 54.86" of precipitation a year, and 48% 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.

Month	Avg high	Avg low	Precip
January	54.7°	37.1°	8.72"
February	56.5°	37.3°	6.61"
March	57.9°	38.6°	7.06"
April	60.4°	40.7°	5.01"
May	64.6°	44.9°	2.73"
June	68.3°	48.4°	1.44"
July	72.2°	51.5°	0.34"
August	73.6°	51.4°	0.37"
September	73.0°	47.7°	1.26"
October	67.0°	43.2°	3.65"
November	58.8°	39.8°	7.66"
December	53.6°	36.4°	10.01"

Rainfall by month

Coos County has a distinct wet season. 48% of the year's precipitation arrives in Nov, Dec, Jan.

January 8.72"

February 6.61"

March 7.06"

April 5.01"

May 2.73"

June 1.44"

July 0.34"

August 0.37"

September 1.26"

October 3.65"

November 7.66"

December 10.01"

Annual total 54.86"

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 34

Heating degree days How much heating the climate demands 4,315

Approximate annual cooling cost At 16.27¢/kWh, Oregon average $6

Approximate annual electric heating cost Lower where heating is gas rather than electric $246

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 Coos County, where electricity is one line of eight.

Common questions

What is the weather like in Coos County?

Coos County averages a high of 73.6°F in August and a low of 36.4°F in December. Annual precipitation is 54.86 inches, with essentially no snow.

When is the rainy season in Coos County?

The wettest stretch is Nov, Dec, Jan, which accounts for 48% 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 Coos County?

The average daily high in August, the hottest month, is 73.6°F. That drives 34 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Coos County?

Effectively no. Measurable snowfall is rare in Coos County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station COQUILLE CITY, OR US (USC00351836), 5.5 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.