Wyoming September Weather

Wyoming weather averages and all-time records in the month of September from 1991–2020 based on data made available by the NOAA.

State:

Month:

Statewide September Averages
High temperature	70.3 °F
Low temperature	40.4 °F
Precipitation	1.3 inches

Wyoming Cities

September weather averages for various places in Wyoming, from 1991–2020.

City	Average (°F)		Record (°F)		Monthly (inches)
City	High	Low	High	Low	Precipitation	Snow
Casper	75.8	42.6	103	14	1.0	1.5
Cheyenne	73.3	45.5	97	8	1.5	1.0
Cody	73.0	46.6	98	9	1.0	0.3
Deaver	77.1	42.5	102	11	0.6	0.0
Gillette	74.7	45.4	102	10	1.3	0.5
Jackson Hole	70.8	33.2	93	5	1.6	0.1
Kemmerer	70.0	33.2	94	5	0.9	0.4
Lander	74.7	45.4	99	10	0.9	1.5
Laramie	70.2	38.6	91	-2	1.1	n/a
Lovell	74.2	43.0	99	14	0.8	0.1
Newcastle	76.1	48.3	101	12	1.2	0.2
Pinedale	69.2	32.3	90	8	1.2	0.7
Rawlins	72.9	41.4	95	8	0.9	n/a
Riverton	75.6	42.6	98	9	0.8	0.6
Rock Springs	71.1	43.5	93	5	0.8	n/a
Sheridan	75.6	42.9	104	6	1.5	n/a
Sundance	73.0	45.1	99	6	1.3	0.8
Thermopolis	79.7	45.7	104	7	1.0	0.3
Wheatland	79.4	45.4	101	12	1.2	0.1
Worland	77.3	43.5	105	12	1.0	0.0
Yellowstone National Park	64.9	30.0	87	-2	1.6	1.1