Montana September Weather

Montana 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	69.9 °F
Low temperature	41.5 °F
Precipitation	1.4 inches

Montana Cities

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

City	Average (°F)		Record (°F)		Monthly (inches)
City	High	Low	High	Low	Precipitation	Snow
Anaconda	71.5	39.1	97	11	1.1	0.4
Billings	74.3	48.6	103	18	1.4	0.3
Bozeman	72.7	42.6	99	12	1.4	0.3
Butte	69.2	36.4	96	3	1.1	n/a
Conrad	71.0	41.0	100	0	1.1	0.6
Cut Bank	68.6	40.6	97	-4	1.1	n/a
Dillon	71.5	40.8	97	9	1.0	n/a
Glasgow	72.9	45.5	106	14	1.1	0.0
Glendive	76.8	47.5	106	14	1.4	0.0
Great Falls	71.7	43.2	102	10	1.3	0.8
Hamilton	73.7	41.3	98	10	0.8	n/a
Hardin	79.4	45.2	105	15	1.3	0.0
Havre	72.9	42.2	104	18	1.1	0.4
Helena	73.4	44.0	102	6	1.0	0.2
Kalispell	70.6	38.9	99	7	1.2	0.0
Livingston	74.4	41.7	102	10	1.2	n/a
Miles City	75.9	47.7	106	17	1.1	n/a
Missoula	73.3	42.4	99	15	1.0	0.1
Opheim	67.8	38.3	100	8	1.2	0.2
Red Lodge	70.0	42.1	97	8	1.9	2.0
West Glacier	69.0	40.7	95	18	1.9	0.0
West Yellowstone	67.9	31.5	91	-9	1.3	n/a