Gary weather by month
What a typical year looks like in Gary, Indiana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at INDIANA DUNES NATIONAL PARK, 22 km from Gary; records cover 1989–2026.
The year at a glance
- Precipitation a year
- 39.2 in995 mm
- Snow a year
- 40 in102 cm
- Last spring freeze
- Apr 22
- First fall freeze
- Oct 25
- Heating degree days
- 6,172
- Cooling degree days
- 809
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −2°−19° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Gary in January
Highs average 32°0° and lows 18°−8°, with 2.2 in56 mm of precipitation and 16 in41 cm of snow in a typical January.
- Record high
- 66°19° (2008)
- Record low
- −22°−30° (2019)
- Heating degree days
- 1242
- Cooling degree days
- 0
Gary in February
Highs average 36°2° and lows 21°−6°, with 2 in50 mm of precipitation and 10 in25 cm of snow in a typical February.
- Record high
- 74°23° (2024)
- Record low
- −15°−26° (1996)
- Heating degree days
- 1028
- Cooling degree days
- 0
Gary in March
Highs average 46°8° and lows 30°−1°, with 2.3 in59 mm of precipitation and 6 in15 cm of snow in a typical March.
- Record high
- 85°29° (2012)
- Record low
- −4°−20° (2002)
- Heating degree days
- 848
- Cooling degree days
- 2
Gary in April
Highs average 57°14° and lows 40°4°, with 3.6 in90 mm of precipitation and 0.6 in1.5 cm of snow in a typical April.
- Record high
- 88°31° (2002)
- Record low
- 18°−8° (2018)
- Heating degree days
- 506
- Cooling degree days
- 7
Gary in May
Highs average 68°20° and lows 50°10°, with 4.3 in108 mm of precipitation in a typical May.
- Record high
- 95°35° (2012)
- Record low
- 30°−1° (2023)
- Heating degree days
- 240
- Cooling degree days
- 54
Gary in June
Highs average 78°25° and lows 60°15°, with 4.3 in109 mm of precipitation in a typical June.
- Record high
- 98°37° (2012)
- Record low
- 37°3° (1990)
- Heating degree days
- 56
- Cooling degree days
- 161
Gary in July
Highs average 82°28° and lows 64°18°, with 4 in101 mm of precipitation in a typical July.
- Record high
- 102°39° (1999)
- Record low
- 45°7° (2001)
- Heating degree days
- 8
- Cooling degree days
- 255
Gary in August
Highs average 80°27° and lows 63°17°, with 4.1 in104 mm of precipitation in a typical August.
- Record high
- 98°37° (1991)
- Record low
- 45°7° (2025)
- Heating degree days
- 11
- Cooling degree days
- 214
Gary in September
Highs average 74°24° and lows 56°13°, with 3.7 in93 mm of precipitation in a typical September.
- Record high
- 98°37° (2026)
- Record low
- 35°2° (1993)
- Heating degree days
- 93
- Cooling degree days
- 102
Gary in OctoberThis month
Highs average 62°17° and lows 45°7°, with 3.8 in95 mm of precipitation in a typical October.
- Record high
- 89°32° (2019)
- Record low
- 23°−5° (2023)
- Heating degree days
- 371
- Cooling degree days
- 14
Gary in November
Highs average 49°9° and lows 34°1°, with 2.8 in70 mm of precipitation and 0.7 in1.8 cm of snow in a typical November.
- Record high
- 77°25° (2016)
- Record low
- 7°−14° (2022)
- Heating degree days
- 707
- Cooling degree days
- 0
Gary in December
Highs average 37°3° and lows 24°−4°, with 2.3 in58 mm of precipitation and 7 in19 cm of snow in a typical December.
- Record high
- 69°21° (2001)
- Record low
- −19°−28° (1989)
- Heating degree days
- 1062
- Cooling degree days
- 0