Anaconda-Deer Lodge County weather by month
What a typical year looks like in Anaconda-Deer Lodge County, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Anaconda, 14 km from Anaconda-Deer Lodge County; records cover 1901–2026.
The year at a glance
- Precipitation a year
- 14.9 in378 mm
- Snow a year
- 75 in191 cm
- Last spring freeze
- Jun 11
- First fall freeze
- Sep 3
- Heating degree days
- 7,880
- Cooling degree days
- 177
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −11°−24° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Anaconda-Deer Lodge County in January
Highs average 37°3° and lows 16°−9°, with 0.57 in14 mm of precipitation and 11 in29 cm of snow in a typical January.
- Record high
- 60°16° (1992)
- Record low
- −37°−38° (2024)
- Heating degree days
- 1201
- Cooling degree days
- 0
Anaconda-Deer Lodge County in February
Highs average 39°4° and lows 16°−9°, with 0.99 in25 mm of precipitation and 11 in29 cm of snow in a typical February.
- Record high
- 65°18° (1921)
- Record low
- −35°−37° (1989)
- Heating degree days
- 1040
- Cooling degree days
- 0
Anaconda-Deer Lodge County in March
Highs average 48°9° and lows 23°−5°, with 1.2 in29 mm of precipitation and 12 in30 cm of snow in a typical March.
- Record high
- 72°22° (2026)
- Record low
- −21°−29° (1920)
- Heating degree days
- 924
- Cooling degree days
- 0
Anaconda-Deer Lodge County in April
Highs average 55°13° and lows 28°−2°, with 1.5 in38 mm of precipitation and 10 in25 cm of snow in a typical April.
- Record high
- 83°28° (1910)
- Record low
- −2°−19° (1926)
- Heating degree days
- 704
- Cooling degree days
- 0
Anaconda-Deer Lodge County in May
Highs average 64°18° and lows 36°2°, with 2.1 in54 mm of precipitation and 2 in5.1 cm of snow in a typical May.
- Record high
- 91°33° (1919)
- Record low
- 14°−10° (2010)
- Heating degree days
- 459
- Cooling degree days
- 2
Anaconda-Deer Lodge County in June
Highs average 73°23° and lows 43°6°, with 2.2 in56 mm of precipitation and 0.6 in1.5 cm of snow in a typical June.
- Record high
- 96°36° (1919)
- Record low
- 23°−5° (1924)
- Heating degree days
- 232
- Cooling degree days
- 15
Anaconda-Deer Lodge County in July
Highs average 83°28° and lows 49°9°, with 1.3 in33 mm of precipitation in a typical July.
- Record high
- 100°38° (1924)
- Record low
- 30°−1° (1994)
- Heating degree days
- 65
- Cooling degree days
- 86
Anaconda-Deer Lodge County in August
Highs average 82°28° and lows 47°8°, with 1.2 in30 mm of precipitation and 0.2 in0.5 cm of snow in a typical August.
- Record high
- 102°39° (1924)
- Record low
- 23°−5° (1910)
- Heating degree days
- 82
- Cooling degree days
- 63
Anaconda-Deer Lodge County in September
Highs average 72°22° and lows 40°4°, with 1.2 in29 mm of precipitation and 0.4 in1 cm of snow in a typical September.
- Record high
- 97°36° (1924)
- Record low
- 11°−12° (1926)
- Heating degree days
- 282
- Cooling degree days
- 11
Anaconda-Deer Lodge County in OctoberThis month
Highs average 57°14° and lows 31°−1°, with 1 in25 mm of precipitation and 3 in8 cm of snow in a typical October.
- Record high
- 88°31° (1992)
- Record low
- −9°−23° (2002)
- Heating degree days
- 657
- Cooling degree days
- 0
Anaconda-Deer Lodge County in November
Highs average 43°6° and lows 21°−6°, with 0.97 in25 mm of precipitation and 12 in31 cm of snow in a typical November.
- Record high
- 74°23° (1924)
- Record low
- −22°−30° (1986)
- Heating degree days
- 980
- Cooling degree days
- 0
Anaconda-Deer Lodge County in December
Highs average 34°1° and lows 15°−10°, with 0.72 in18 mm of precipitation and 12 in31 cm of snow in a typical December.
- Record high
- 60°16° (1924)
- Record low
- −38°−39° (1983)
- Heating degree days
- 1254
- Cooling degree days
- 0