30-year climate normals

Tillamook County Climate and Weather Averages

Hottest month — August

68.9°

average daily high. The coldest month is February, averaging a low of 37.1°F.

Tillamook County gets 84.39" of precipitation a year, and 45% 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	48.4°	38.4°	11.81"
February	50.8°	37.1°	9.37"
March	52.6°	38.2°	9.54"
April	55.4°	39.9°	6.95"
May	59.4°	43.6°	4.43"
June	64.2°	47.3°	3.28"
July	68.0°	50.0°	0.86"
August	68.9°	50.4°	1.33"
September	67.5°	47.6°	3.33"
October	60.3°	42.9°	7.40"
November	51.8°	40.2°	12.41"
December	47.2°	37.7°	13.68"

Rainfall by month

Tillamook County has a distinct wet season. 45% of the year's precipitation arrives in Nov, Dec, Jan.

January 11.81"

February 9.37"

March 9.54"

April 6.95"

May 4.43"

June 3.28"

July 0.86"

August 1.33"

September 3.33"

October 7.40"

November 12.41"

December 13.68"

Annual total 84.39"

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 11

Heating degree days How much heating the climate demands 5,354

Approximate annual cooling cost At 16.27¢/kWh, Oregon average $2

Approximate annual electric heating cost Lower where heating is gas rather than electric $305

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 Tillamook County, where electricity is one line of eight.

Common questions

What is the weather like in Tillamook County?

Tillamook County averages a high of 68.9°F in August and a low of 37.1°F in February. Annual precipitation is 84.39 inches, with essentially no snow.

When is the rainy season in Tillamook County?

The wettest stretch is Nov, Dec, Jan, which accounts for 45% 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 Tillamook County?

The average daily high in August, the hottest month, is 68.9°F. That drives 11 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Tillamook County?

Effectively no. Measurable snowfall is rare in Tillamook County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station TILLAMOOK 6SE, OR US (USC00358498), 1.8 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.