What is the hottest month in Simms, MT?

July is the warmest month, with a normal high of 80°F at Fairfield.

What is the coldest month in Simms, MT?

January is the coldest month, with a normal low of 17°F.

What is the wettest month in Simms, MT?

June has the most precipitation on average, about 2.63 inches.

Checked Oct 25, 2026

Simms, MT Climate

1991 to 2020 normals at Fairfield, 8.9 mi from the center of Simms, elevation 3983 ft.

Average weather by month

Select a month for daily normals and last year's weather

Month	High	Low	Precip.	Snow
January	36°	17°	0.34 in	--
February	36°	17°	0.43 in	--
March	45°	24°	0.60 in	--
April	53°	32°	1.36 in	--
May	62°	41°	2.12 in	--
June	70°	48°	2.63 in	--
July	80°	53°	1.08 in	--
August	79°	52°	1.05 in	--
September	69°	44°	1.23 in	--
October	55°	34°	0.74 in	--
November	43°	25°	0.46 in	--
December	35°	18°	0.33 in	--
Year	55°		12.37 in	--

Frequently asked questions

What is the hottest month in Simms, MT?: July is the warmest month, with a normal high of 80°F at Fairfield.
What is the coldest month in Simms, MT?: January is the coldest month, with a normal low of 17°F.
What is the wettest month in Simms, MT?: June has the most precipitation on average, about 2.63 inches.

Today

Simms, MT forecast

Data sources

U.S. Climate Normals 1991-2020NOAA National Centers for Environmental Information
U.S. Climate Normals 1991-2020 (daily) and GHCN-Daily via Access Data ServiceNOAA National Centers for Environmental Information

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About this data

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Climate normals are 30-year averages measured at one weather station, which may be miles from the place named here or at a different elevation.

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