Counties in Wyoming by annual precipitation

Teton County had the highest annual precipitation of 23 counties in 2018, at 35.71 inches. Sweetwater County had the lowest, at 8.34 inches. The median was 15.78 inches and the figure for Wyoming was 16.12 inches. Source: NOAA National Centers for Environmental Information.

Highest35.71Teton County

Lowest8.34Sweetwater County

Median15.7823 counties

Wyoming16.12History

Map of counties, 2018

Under 13
13 to 15
15 to 17
17 to 21
21 and over

inches, 2018. Source: NOAA NCEI, NOAA Climate at a Glance, January to December precipitation, counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2018

inches. Source: NOAA NCEI, NOAA Climate at a Glance, January to December precipitation, counties. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2018 inches	Change on 2017
1	Teton County	35.71	-21.9%
2	Park County	23.46	-21.1%
3	Niobrara County	22.53	+47.1%
4	Weston County	21.94	+43.2%
5	Crook County	21.9	+29.3%
6	Sheridan County	19.17	-1.7%
7	Campbell County	18.17	+26.7%
8	Lincoln County	18	-31.8%
9	Converse County	17.46	+14.2%
10	Sublette County	16.64	-32.7%
11	Laramie County	15.94	+0.5%
12	Goshen County	15.78	+5.9%
13	Platte County	15.27	+8.5%
14	Johnson County	15.1	-12.2%
15	Big Horn County	14.31	-4.8%
16	Fremont County	13.54	-35.7%
17	Albany County	13.01	-13%
18	Hot Springs County	12.9	-28.3%
19	Carbon County	12.55	-18.1%
20	Washakie County	12.05	-20.6%
21	Natrona County	11.39	-8.9%
22	Uinta County	10.7	-21.2%
23	Sweetwater County	8.34	-25.3%

Other periods

About this ranking

Total precipitation from January to December, in inches: rain plus the water content of snow and other frozen precipitation. 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, not the reading at one weather station. 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 precipitation, 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 precipitation, counties (Counties in Wyoming by annual precipitation, 2018) [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 precipitation, counties, Counties in Wyoming by annual precipitation, 2018. 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/annual-precipitation/wyoming-counties?period=2018. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December precipitation, counties. Counties in Wyoming by annual precipitation, 2018. 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/annual-precipitation/wyoming-counties?period=2018.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December precipitation, counties, Counties in Wyoming by annual precipitation, 2018 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/rankings/annual-precipitation/wyoming-counties?period=2018 (Accessed: 12 October 2026).

BibTeX

@misc{noaa_counties_in_wyoming_by_2018,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December precipitation, counties: Counties in Wyoming by annual precipitation, 2018}},
  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/annual-precipitation/wyoming-counties?period=2018. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December precipitation, 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 precipitation, counties: Counties in Wyoming by annual precipitation, 2018
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/annual-precipitation/wyoming-counties?period=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/annual-precipitation/wyoming-counties?period=2018.
N1  - Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December precipitation, 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 annual precipitation?

Teton County, with 35.71 inches in 2018, according to NOAA National Centers for Environmental Information.

Which county has the lowest annual precipitation?

Sweetwater County, with 8.34 inches in 2018.

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 precipitation, counties. Retrieved 2026-10-12.