Cascade weather by month
What a typical year looks like in Cascade, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Sun River 4 S, 22 km from Cascade; records cover 1943–2026.
The year at a glance
- Precipitation a year
- 13.3 in339 mm
- Snow a year
- Rare
- Last spring freeze
- May 24
- First fall freeze
- Sep 17
- Heating degree days
- 7,940
- Cooling degree days
- 178
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −22°−30° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Cascade in January
Highs average 38°3° and lows 13°−11°, with 0.42 in11 mm of precipitation in a typical January.
- Record high
- 66°19° (2015)
- Record low
- −46°−43° (1954)
- Heating degree days
- 1237
- Cooling degree days
- 0
Cascade in February
Highs average 39°4° and lows 13°−11°, with 0.49 in12 mm of precipitation in a typical February.
- Record high
- 73°23° (1992)
- Record low
- −45°−43° (1996)
- Heating degree days
- 1093
- Cooling degree days
- 0
Cascade in March
Highs average 47°8° and lows 20°−7°, with 0.6 in15 mm of precipitation in a typical March.
- Record high
- 78°26° (1978)
- Record low
- −41° (2019)
- Heating degree days
- 980
- Cooling degree days
- 0
Cascade in April
Highs average 56°13° and lows 28°−2°, with 1.7 in43 mm of precipitation in a typical April.
- Record high
- 88°31° (1980)
- Record low
- −16°−27° (1975)
- Heating degree days
- 687
- Cooling degree days
- 0
Cascade in May
Highs average 65°18° and lows 36°2°, with 2.2 in56 mm of precipitation in a typical May.
- Record high
- 93°34° (1988)
- Record low
- 8°−13° (1954)
- Heating degree days
- 452
- Cooling degree days
- 1
Cascade in June
Highs average 73°23° and lows 44°6°, with 2.7 in68 mm of precipitation in a typical June.
- Record high
- 99°37° (1990)
- Record low
- 26°−3° (1969)
- Heating degree days
- 219
- Cooling degree days
- 13
Cascade in July
Highs average 83°29° and lows 48°9°, with 1.1 in28 mm of precipitation in a typical July.
- Record high
- 111°44° (2006)
- Record low
- 33°1° (1958)
- Heating degree days
- 64
- Cooling degree days
- 86
Cascade in August
Highs average 82°28° and lows 47°8°, with 1 in26 mm of precipitation in a typical August.
- Record high
- 102°39° (1961)
- Record low
- 28°−2° (1992)
- Heating degree days
- 90
- Cooling degree days
- 67
Cascade in September
Highs average 72°22° and lows 40°4°, with 1.3 in32 mm of precipitation in a typical September.
- Record high
- 98°37° (2022)
- Record low
- 16°−9° (1984)
- Heating degree days
- 292
- Cooling degree days
- 10
Cascade in OctoberThis month
Highs average 58°14° and lows 31°−1°, with 0.9 in23 mm of precipitation in a typical October.
- Record high
- 91°33° (1992)
- Record low
- −19°−28° (1991)
- Heating degree days
- 643
- Cooling degree days
- 1
Cascade in November
Highs average 45°7° and lows 21°−6°, with 0.55 in14 mm of precipitation in a typical November.
- Record high
- 74°23° (1962)
- Record low
- −40° (1959)
- Heating degree days
- 957
- Cooling degree days
- 0
Cascade in December
Highs average 37°3° and lows 14°−10°, with 0.39 in9.9 mm of precipitation in a typical December.
- Record high
- 69°21° (2021)
- Record low
- −51°−46° (1968)
- Heating degree days
- 1226
- Cooling degree days
- 0