Cass weather by month
What a typical year looks like in Cass, Indiana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Shakamak State Park, 9 km from Cass; records cover 1989–2025.
The year at a glance
- Precipitation a year
- 47.2 in1198 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 14
- First fall freeze
- Oct 18
- Heating degree days
- 5,043
- Cooling degree days
- 1,193
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −1°−18° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Cass in January
Highs average 38°3° and lows 21°−6°, with 3.3 in85 mm of precipitation in a typical January.
- Record high
- 67°19° (1990)
- Record low
- −33°−36° (1994)
- Heating degree days
- 1102
- Cooling degree days
- 0
Cass in February
Highs average 43°6° and lows 24°−5°, with 2.8 in70 mm of precipitation in a typical February.
- Record high
- 76°24° (2018)
- Record low
- −14°−26° (1996)
- Heating degree days
- 888
- Cooling degree days
- 0
Cass in March
Highs average 53°12° and lows 33°0°, with 3.5 in88 mm of precipitation in a typical March.
- Record high
- 83°28° (2012)
- Record low
- −4°−20° (2015)
- Heating degree days
- 680
- Cooling degree days
- 3
Cass in April
Highs average 66°19° and lows 44°7°, with 5.1 in129 mm of precipitation in a typical April.
- Record high
- 87°31° (2004)
- Record low
- 19°−7° (1990)
- Heating degree days
- 322
- Cooling degree days
- 20
Cass in May
Highs average 75°24° and lows 54°12°, with 5.2 in133 mm of precipitation in a typical May.
- Record high
- 95°35° (1998)
- Record low
- 22°−6° (2002)
- Heating degree days
- 115
- Cooling degree days
- 98
Cass in June
Highs average 83°28° and lows 63°17°, with 5.1 in129 mm of precipitation in a typical June.
- Record high
- 103°39° (2012)
- Record low
- 38°3° (1992)
- Heating degree days
- 12
- Cooling degree days
- 248
Cass in July
Highs average 86°30° and lows 66°19°, with 4.7 in119 mm of precipitation in a typical July.
- Record high
- 104°40° (2012)
- Record low
- 48°9° (2001)
- Heating degree days
- 1
- Cooling degree days
- 340
Cass in August
Highs average 85°29° and lows 65°18°, with 3.2 in82 mm of precipitation in a typical August.
- Record high
- 98°37° (2012)
- Record low
- 47°8° (2004)
- Heating degree days
- 2
- Cooling degree days
- 304
Cass in September
Highs average 79°26° and lows 57°14°, with 3.6 in91 mm of precipitation in a typical September.
- Record high
- 97°36° (2011)
- Record low
- 32°0° (1995)
- Heating degree days
- 53
- Cooling degree days
- 150
Cass in OctoberThis month
Highs average 68°20° and lows 45°7°, with 3.8 in96 mm of precipitation in a typical October.
- Record high
- 92°33° (2019)
- Record low
- 24°−4° (1992)
- Heating degree days
- 290
- Cooling degree days
- 28
Cass in November
Highs average 54°12° and lows 34°1°, with 3.9 in99 mm of precipitation in a typical November.
- Record high
- 82°28° (2003)
- Record low
- 2°−17° (2019)
- Heating degree days
- 630
- Cooling degree days
- 2
Cass in December
Highs average 43°6° and lows 26°−3°, with 3 in77 mm of precipitation in a typical December.
- Record high
- 73°23° (1998)
- Record low
- −22°−30° (1989)
- Heating degree days
- 948
- Cooling degree days
- 0