Butte-Silver Bow weather by month
What a typical year looks like in Butte-Silver Bow, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at BUTTE BERT MOONEY AP, 14 km from Butte-Silver Bow; records cover 1894–2026.
The year at a glance
- Precipitation a year
- 12.8 in324 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 16
- First fall freeze
- Sep 3
- Heating degree days
- 9,127
- Cooling degree days
- 83
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −20°−29° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Butte-Silver Bow in January
Highs average 32°0° and lows 8°−13°, with 0.42 in11 mm of precipitation in a typical January.
- Record high
- 58°14° (1931)
- Record low
- −48°−44° (1937)
- Heating degree days
- 1395
- Cooling degree days
- 0
Butte-Silver Bow in February
Highs average 35°1° and lows 10°−12°, with 0.43 in11 mm of precipitation in a typical February.
- Record high
- 61°16° (1921)
- Record low
- −52°−47° (1933)
- Heating degree days
- 1198
- Cooling degree days
- 0
Butte-Silver Bow in March
Highs average 44°7° and lows 19°−7°, with 0.64 in16 mm of precipitation in a typical March.
- Record high
- 70°21° (2026)
- Record low
- −36°−38° (1948)
- Heating degree days
- 1037
- Cooling degree days
- 0
Butte-Silver Bow in April
Highs average 51°11° and lows 26°−3°, with 1.3 in34 mm of precipitation in a typical April.
- Record high
- 83°28° (1910)
- Record low
- −16°−27° (1982)
- Heating degree days
- 787
- Cooling degree days
- 0
Butte-Silver Bow in May
Highs average 61°16° and lows 34°1°, with 2 in51 mm of precipitation in a typical May.
- Record high
- 90°32° (1919)
- Record low
- 9°−13° (1965)
- Heating degree days
- 538
- Cooling degree days
- 0
Butte-Silver Bow in June
Highs average 70°21° and lows 41°5°, with 2.5 in62 mm of precipitation in a typical June.
- Record high
- 97°36° (1919)
- Record low
- 22°−6° (1916)
- Heating degree days
- 290
- Cooling degree days
- 6
Butte-Silver Bow in July
Highs average 81°27° and lows 46°8°, with 1.2 in30 mm of precipitation in a typical July.
- Record high
- 100°38° (1931)
- Record low
- 28°−2° (1971)
- Heating degree days
- 91
- Cooling degree days
- 48
Butte-Silver Bow in August
Highs average 80°27° and lows 44°7°, with 1.3 in33 mm of precipitation in a typical August.
- Record high
- 99°37° (1940)
- Record low
- 23°−5° (1992)
- Heating degree days
- 124
- Cooling degree days
- 27
Butte-Silver Bow in September
Highs average 69°21° and lows 37°3°, with 1.1 in27 mm of precipitation in a typical September.
- Record high
- 96°36° (2022)
- Record low
- 3°−16° (1926)
- Heating degree days
- 368
- Cooling degree days
- 2
Butte-Silver Bow in OctoberThis month
Highs average 54°12° and lows 27°−3°, with 0.84 in21 mm of precipitation in a typical October.
- Record high
- 85°29° (2010)
- Record low
- −23°−31° (1991)
- Heating degree days
- 758
- Cooling degree days
- 0
Butte-Silver Bow in November
Highs average 40°5° and lows 16°−9°, with 0.6 in15 mm of precipitation in a typical November.
- Record high
- 70°21° (1999)
- Record low
- −42°−41° (1959)
- Heating degree days
- 1114
- Cooling degree days
- 0
Butte-Silver Bow in December
Highs average 31°−1° and lows 7°−14°, with 0.48 in12 mm of precipitation in a typical December.
- Record high
- 66°19° (1917)
- Record low
- −52°−47° (1983)
- Heating degree days
- 1427
- Cooling degree days
- 0