Annual Wyoming rainfall

Driest location ranked by lowest annual precipitation: Lysite, central Wyoming, 5.11"

Wettest location ranked by highest annual precipitation: Snake River, western Wyoming, 31.54"

Snowiest location ranked by highest annual snowfall: Bechler Ranger Station, northwestern Wyoming, 285.0"

State precipitation record for 24 hours - Cheyenne, southeastern Wyoming, 8/1/1985, 6.06"

State precipitation record for 1 year - Grassy Lake Dam, western Wyoming, 1945, 55.46"

State snowfall record for 24 hours - Glenrock, central Wyoming, 4/19/1973, 41.0"

State snow record for 1 season - Bechler River, northwestern Wyoming, 1932-1933, 491.6"

Wyoming is the seventh most earthquake-prone state in the nation

Although Wyoming is the third driest state in the nation, Lander, Wyoming is the seventh snowiest city in the 
U.S. with 102.5 inches of snowfall per year

Cheyenne, Wyoming is considered to have the cleanest air in the nation, based on long-term particle pollution

Precipitation data for other U.S. states
Data source: National Data Climatic Center

City	Avg Annual Precip	Avg Snow Annual	Avg # days of Precip	Avg # thunderstorm days	Avg # hail days
Casper	13.03	76.9	95	34	3
Cheyenne	15.45	56.1	100	41	3
Lander	13.42	99.6	72	32	2
Sheridan	14.72	71.4	107	33	1
State Average - 12.97", 48th wettest in the U.S.