Gorham weather by month
What a typical year looks like in Gorham, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Carbondale Southern Illinois Airport, 22 km from Gorham; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 44 in1118 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 9
- First fall freeze
- Oct 18
- Heating degree days
- 4,462
- Cooling degree days
- 1,370
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 7°−14° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Gorham in January
Highs average 42°5° and lows 25°−4°, with 2.8 in71 mm of precipitation in a typical January.
- Record high
- 71°22° (2002)
- Record low
- −6°−21° (2003)
- Heating degree days
- 984
- Cooling degree days
- 0
Gorham in February
Highs average 47°8° and lows 28°−2°, with 2.6 in66 mm of precipitation in a typical February.
- Record high
- 79°26° (2024)
- Record low
- −7°−22° (2015)
- Heating degree days
- 770
- Cooling degree days
- 0
Gorham in March
Highs average 57°14° and lows 36°2°, with 4.1 in105 mm of precipitation in a typical March.
- Record high
- 86°30° (2026)
- Record low
- −3°−19° (2015)
- Heating degree days
- 577
- Cooling degree days
- 4
Gorham in April
Highs average 68°20° and lows 45°7°, with 5.3 in136 mm of precipitation in a typical April.
- Record high
- 88°31° (2007)
- Record low
- 23°−5° (2007)
- Heating degree days
- 275
- Cooling degree days
- 24
Gorham in May
Highs average 77°25° and lows 55°13°, with 5 in126 mm of precipitation in a typical May.
- Record high
- 95°35° (2012)
- Record low
- 33°1° (2020)
- Heating degree days
- 81
- Cooling degree days
- 118
Gorham in June
Highs average 86°30° and lows 64°18°, with 4.1 in104 mm of precipitation in a typical June.
- Record high
- 107°42° (2012)
- Record low
- 44°7° (2003)
- Heating degree days
- 4
- Cooling degree days
- 302
Gorham in July
Highs average 88°31° and lows 68°20°, with 3.6 in92 mm of precipitation in a typical July.
- Record high
- 107°42° (2012)
- Record low
- 51°11° (2013)
- Heating degree days
- 0
- Cooling degree days
- 401
Gorham in August
Highs average 87°31° and lows 65°18°, with 3.1 in77 mm of precipitation in a typical August.
- Record high
- 104°40° (2010)
- Record low
- 45°7° (2025)
- Heating degree days
- 1
- Cooling degree days
- 342
Gorham in September
Highs average 81°27° and lows 56°13°, with 2.9 in72 mm of precipitation in a typical September.
- Record high
- 103°39° (2026)
- Record low
- 33°1° (2022)
- Heating degree days
- 49
- Cooling degree days
- 146
Gorham in OctoberThis month
Highs average 70°21° and lows 45°7°, with 3.5 in90 mm of precipitation in a typical October.
- Record high
- 95°35° (2019)
- Record low
- 22°−6° (2022)
- Heating degree days
- 267
- Cooling degree days
- 31
Gorham in November
Highs average 56°13° and lows 35°2°, with 3.9 in98 mm of precipitation in a typical November.
- Record high
- 82°28° (2005)
- Record low
- 9°−13° (2019)
- Heating degree days
- 584
- Cooling degree days
- 2
Gorham in December
Highs average 46°8° and lows 28°−2°, with 3.1 in79 mm of precipitation in a typical December.
- Record high
- 75°24° (2021)
- Record low
- −11°−24° (2004)
- Heating degree days
- 870
- Cooling degree days
- 0