30-year climate normals

Deer Lodge County Climate and Weather Averages

Hottest month — July

82.7°

average daily high. The coldest month is December, averaging a low of 14.7°F.

Deer Lodge County gets 14.89" of precipitation a year and 75.1" of snow, and 39% of it falls in Apr, May, Jun.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip	Snow
January	36.6°	15.9°	0.57"	11.4"
February	39.3°	16.4°	0.99"	11.3"
March	47.5°	22.9°	1.15"	11.8"
April	54.7°	28.4°	1.50"	9.9"
May	64.1°	36.4°	2.13"	2.0"
June	72.5°	43.0°	2.21"	0.6"
July	82.7°	48.7°	1.30"	0.0"
August	81.5°	47.3°	1.20"	0.2"
September	72.2°	39.7°	1.15"	0.4"
October	57.1°	30.5°	1.00"	3.3"
November	43.4°	21.3°	0.97"	12.1"
December	34.4°	14.7°	0.72"	12.1"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 39% falling in the wettest three months (Apr, May, Jun).

January 0.57"

February 0.99"

March 1.15"

April 1.50"

May 2.13"

June 2.21"

July 1.30"

August 1.20"

September 1.15"

October 1.00"

November 0.97"

December 0.72"

Annual total 14.89"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 177

Heating degree days How much heating the climate demands 7,880

Approximate annual cooling cost At 14.67¢/kWh, Montana average $26

Approximate annual electric heating cost Lower where heating is gas rather than electric $405

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Deer Lodge County, where electricity is one line of eight.

Common questions

What is the weather like in Deer Lodge County?

Deer Lodge County averages a high of 82.7°F in July and a low of 14.7°F in December. Annual precipitation is 14.89 inches, including 75.1 inches of snow.

When is the rainy season in Deer Lodge County?

The wettest stretch is Apr, May, Jun, which accounts for 39% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Deer Lodge County?

The average daily high in July, the hottest month, is 82.7°F. That drives 177 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Deer Lodge County?

Yes. Deer Lodge County averages 75.1 inches of snow a year.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station ANACONDA, MT US (USC00240199), 10.3 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Montana residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.