Counties in Washington by average annual temperature

Walla Walla County had the highest average annual temperature of 39 counties in 2015, at 55.3 °F. Pend Oreille County had the lowest, at 45.6 °F. The median was 51.2 °F and the figure for Washington was 50 °F. Source: NOAA National Centers for Environmental Information.

Highest55.3Walla Walla County

Lowest45.6Pend Oreille County

Median51.239 counties

Washington50History

Map of counties, 2015

Under 48
48 to 50
50 to 51
51 to 52
52 to 53
53 and over

°F, 2015. Source: NOAA NCEI, NOAA Climate at a Glance, January to December average temperature, counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2015

°F. Source: NOAA NCEI, NOAA Climate at a Glance, January to December average temperature, counties. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2015 °F	Change on 2014
1	Walla Walla County	55.3	+3%
2	Benton County	55.1	+2.4%
3	Clark County	54.6	+2.2%
3	Franklin County	54.6	+2.6%
5	Kitsap County	54.3	+1.9%
6	Grant County	53.5	+2.9%
7	Thurston County	53	+1.3%
8	Island County	52.9	+1.7%
9	Cowlitz County	52.7	+2.1%
9	Wahkiakum County	52.7	+1.2%
11	Adams County	52.5	+3.3%
11	Pacific County	52.5	+1%
13	San Juan County	52.4	+2.3%
14	Grays Harbor County	52.3	+1.2%
15	Whitman County	52	+3.4%
16	Klickitat County	51.7	+3.6%
17	Mason County	51.6	+1.8%
18	Asotin County	51.3	+2.8%
18	Garfield County	51.3	+3%
20	Columbia County	51.2	+3.4%
21	Douglas County	51.1	+3.2%
22	King County	50.6	+2.4%
23	Spokane County	50.3	+4.8%
24	Lewis County	50.2	+2.4%
25	Yakima County	50	+4%
26	Clallam County	49.8	+1.8%
26	Pierce County	49.8	+2.5%
28	Lincoln County	49.6	+3.8%
29	Snohomish County	49.2	+2.9%
30	Kittitas County	48.8	+4.5%
31	Skagit County	48.7	+3.4%
31	Skamania County	48.7	+3.2%
33	Jefferson County	48.2	+1.9%
33	Stevens County	48.2	+5.2%
35	Whatcom County	47.4	+3.5%
36	Chelan County	46.4	+4.3%
37	Ferry County	46.2	+5.2%
38	Okanogan County	45.8	+4.6%
39	Pend Oreille County	45.6	+5.8%

Other periods

About this ranking

Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.

Values are area averages, so a county with mountains and valleys has one value for very different local climates. NOAA revises the last two years every month.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December average temperature, counties (Counties in Washington by average annual temperature, 2015) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping

MLA 9

NOAA Climate at a Glance, January to December average temperature, counties, Counties in Washington by average annual temperature, 2015. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Invokely, https://invokely.ai/rankings/average-annual-temperature/washington-counties?period=2015. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December average temperature, counties. Counties in Washington by average annual temperature, 2015. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Also distributed by Invokely, https://invokely.ai/rankings/average-annual-temperature/washington-counties?period=2015.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December average temperature, counties, Counties in Washington by average annual temperature, 2015 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/rankings/average-annual-temperature/washington-counties?period=2015 (Accessed: 12 October 2026).

BibTeX

@misc{noaa_counties_in_washington_by_2015,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December average temperature, counties: Counties in Washington by average annual temperature, 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/average-annual-temperature/washington-counties?period=2015. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December average temperature, counties: Counties in Washington by average annual temperature, 2015
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
L2  - https://invokely.ai/rankings/average-annual-temperature/washington-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/average-annual-temperature/washington-counties?period=2015.
N1  - Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest average annual temperature?

Walla Walla County, with 55.3 °F in 2015, according to NOAA National Centers for Environmental Information.

Which county has the lowest average annual temperature?

Pend Oreille County, with 45.6 °F in 2015.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December average temperature, counties. Retrieved 2026-10-12.