Inverness weather by month
What a typical year looks like in Inverness, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Chester, 20 km from Inverness; records cover 1900–2026.
The year at a glance
- Precipitation a year
- 12.3 in312 mm
- Snow a year
- 37 in93 cm
- Last spring freeze
- May 20
- First fall freeze
- Sep 20
- Heating degree days
- 8,848
- Cooling degree days
- 256
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −24°−31° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Inverness in January
Highs average 29°−2° and lows 3°−16°, with 0.54 in14 mm of precipitation and 8 in21 cm of snow in a typical January.
- Record high
- 66°19° (1992)
- Record low
- −57°−49° (1950)
- Heating degree days
- 1530
- Cooling degree days
- 0
Inverness in February
Highs average 33°1° and lows 6°−14°, with 0.45 in11 mm of precipitation and 6 in14 cm of snow in a typical February.
- Record high
- 74°23° (1992)
- Record low
- −44°−42° (1905)
- Heating degree days
- 1271
- Cooling degree days
- 0
Inverness in March
Highs average 44°7° and lows 17°−9°, with 0.59 in15 mm of precipitation and 5 in13 cm of snow in a typical March.
- Record high
- 79°26° (2004)
- Record low
- −38°−39° (1951)
- Heating degree days
- 1074
- Cooling degree days
- 0
Inverness in April
Highs average 56°13° and lows 28°−2°, with 1.1 in28 mm of precipitation and 4 in9 cm of snow in a typical April.
- Record high
- 88°31° (1906)
- Record low
- −19°−28° (1975)
- Heating degree days
- 705
- Cooling degree days
- 0
Inverness in May
Highs average 66°19° and lows 38°3°, with 1.7 in43 mm of precipitation and 0.4 in1 cm of snow in a typical May.
- Record high
- 94°34° (1920)
- Record low
- 8°−13° (1946)
- Heating degree days
- 408
- Cooling degree days
- 5
Inverness in June
Highs average 73°23° and lows 46°8°, with 2.8 in70 mm of precipitation and 0.1 in0.3 cm of snow in a typical June.
- Record high
- 101°38° (1919)
- Record low
- 19°−7° (1918)
- Heating degree days
- 188
- Cooling degree days
- 22
Inverness in July
Highs average 83°28° and lows 52°11°, with 1.2 in30 mm of precipitation in a typical July.
- Record high
- 104°40° (2007)
- Record low
- 30°−1° (1914)
- Heating degree days
- 53
- Cooling degree days
- 118
Inverness in August
Highs average 82°28° and lows 50°10°, with 1.1 in28 mm of precipitation in a typical August.
- Record high
- 105°41° (1961)
- Record low
- 28°−2° (1914)
- Heating degree days
- 73
- Cooling degree days
- 99
Inverness in September
Highs average 71°22° and lows 41°5°, with 1 in25 mm of precipitation and 0.6 in1.5 cm of snow in a typical September.
- Record high
- 99°37° (2022)
- Record low
- 8°−13° (2019)
- Heating degree days
- 290
- Cooling degree days
- 12
Inverness in OctoberThis month
Highs average 57°14° and lows 27°−3°, with 0.74 in19 mm of precipitation and 0.7 in1.8 cm of snow in a typical October.
- Record high
- 90°32° (1943)
- Record low
- −17°−27° (1991)
- Heating degree days
- 712
- Cooling degree days
- 0
Inverness in November
Highs average 41°5° and lows 15°−9°, with 0.58 in15 mm of precipitation and 6 in14 cm of snow in a typical November.
- Record high
- 77°25° (1900)
- Record low
- −33°−36° (1900)
- Heating degree days
- 1106
- Cooling degree days
- 0
Inverness in December
Highs average 32°0° and lows 6°−15°, with 0.56 in14 mm of precipitation and 6 in16 cm of snow in a typical December.
- Record high
- 80°27° (1915)
- Record low
- −52°−47° (1983)
- Heating degree days
- 1438
- Cooling degree days
- 0