Average May Temperatures for Wyoming

Average temperatures for May at cities, towns, parks and lakes throughout Wyoming are listed below in degrees Fahrenheit and Celsius.

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

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Northwest Wyoming

Average May temperatures
High °F	Low °F	Place	High °C	Low °C
60	36	Alta	16	2
64	42	Cody	18	6
60	32	Jackson	16	0
62	33	Moose	16	0
56	31	Moran	14	-1
50	29	Yellowstone Lake	10	-2
60	35	Yellowstone Park, Mammoth	15	1
55	29	Yellowstone Park, Old Faithful	13	-2
56	28	Yellowstone Park, South Entrance	14	-2

Southwest Wyoming

Average daily temperatures in May
High °F	Low °F	Place	High °C	Low °C
63	35	Evanston	17	1
63	31	Fontenelle Reservoir Dam	17	-1
63	30	Fossil Butte Monument	17	-1
63	31	Kemmerer	17	-1
63	38	Rock Springs	17	4

North - Central Wyoming

May temperatures: daily averages
High °F	Low °F	Place	High °C	Low °C
69	43	Boysen Reservoir Dam	20	6
50	28	Burgess Junction	10	-2
66	39	Lander	19	4
67	40	Riverton	20	5
59	28	South Pass City	15	-2
65	37	Ten Sleep	18	3
71	43	Thermopolis	22	6
70	40	Worland	21	4

Northeast Wyoming

Average May temperatures
High °F	Low °F	Place	High °C	Low °C
62	37	Buffalo	17	3
66	39	Devils Tower	19	4
66	41	Gillette	19	5
66	39	Sheridan	19	4
63	39	Sundance	17	4

Southeast Wyoming

Average May temperatures
High °F	Low °F	Place	High °C	Low °C
67	37	Casper	19	3
61	32	Centennial	16	0
64	40	Cheyenne	18	5
68	39	Douglas	20	4
60	36	Laramie	16	2
68	39	Muddy Gap	20	4
64	36	Rawlins	18	2
71	41	Torrington	22	5

Average Temperatures for Wyoming in May

Northwest Wyoming

Southwest Wyoming

North - Central Wyoming

Northeast Wyoming

Southeast Wyoming

Reference

More Wyoming Weather Information