Average Annual Precipitation for Wyoming





The tables below give yearly averages for rainfall plus snowfall at cities, towns and parks in Wyoming.

Each place has a total for the amount of precipitation it usually receives in a year. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The annual precipitation totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for each region of the state: Northwest, Southwest, North - Central, Northeast and Southeast Wyoming.

Northwest Wyoming

Average yearly precipitation
Days Place Inches Milli­metres
94 Alta 25.0 634
72 Cody 11.5 292
116 Jackson 17.6 448
137 Moose 23.0 584
132 Moran 25.4 645
151 Yellowstone Lake 22.5 573
127 Yellowstone Park, Mammoth 14.8 376
142 Yellowstone Park, Old Faithful 25.6 651
160 Yellowstone Park, South Entrance 32.8 834

Southwest Wyoming

Annual averages for rainfall plus snowfall
Days Place Inches Milli­metres
70 Evanston 12.1 308
58 Fontenelle Reservoir Dam 7.6 192
93 Fossil Butte Monument 11.7 298
53 Kemmerer 9.4 239
72 Rock Springs 7.6 192

North - Central Wyoming

Average amount of rain and snow a year
Days Place Inches Milli­metres
56 Boysen Reservoir Dam 9.0 229
69 Lander 13.2 336
61 Riverton 9.5 241
84 Ten Sleep 14.0 355
59 Thermopolis 12.0 304
64 Worland 7.7 196

Northeast Wyoming

Average annual precipitation
Days Place Inches Milli­metres
85 Buffalo 13.8 349
94 Devils Tower 19.1 485
100 Gillette 17.6 447
102 Sheridan 14.9 379
108 Sundance 20.4 517

Southeast Wyoming

Annual precipitation totals
Days Place Inches Milli­metres
91 Casper 12.2 310
102 Cheyenne 15.4 391
84 Douglas 14.5 369
105 Laramie 13.1 332
82 Rawlins 9.0 230
66 Torrington 14.9 379
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Wyoming Precipitation
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