New Salem weather by month
What a typical year looks like in New Salem, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Perry 6 NW, 11 km from New Salem; records cover 1992–2026.
The year at a glance
- Precipitation a year
- 39.1 in992 mm
- Snow a year
- 21 in53 cm
- Last spring freeze
- Apr 18
- First fall freeze
- Oct 10
- Heating degree days
- 5,406
- Cooling degree days
- 1,168
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −3°−19° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
New Salem in January
Highs average 37°3° and lows 18°−8°, with 2 in50 mm of precipitation and 6 in15 cm of snow in a typical January.
- Record high
- 74°23° (2026)
- Record low
- −26°−32° (1999)
- Heating degree days
- 1173
- Cooling degree days
- 0
New Salem in February
Highs average 42°5° and lows 22°−6°, with 2 in51 mm of precipitation and 6 in15 cm of snow in a typical February.
- Record high
- 79°26° (2017)
- Record low
- −21°−29° (1996)
- Heating degree days
- 934
- Cooling degree days
- 0
New Salem in March
Highs average 53°12° and lows 31°0°, with 2.6 in65 mm of precipitation and 2.4 in6.1 cm of snow in a typical March.
- Record high
- 91°33° (2026)
- Record low
- −20°−29° (2024)
- Heating degree days
- 714
- Cooling degree days
- 3
New Salem in April
Highs average 65°18° and lows 42°5°, with 3.9 in100 mm of precipitation and 0.4 in1 cm of snow in a typical April.
- Record high
- 90°32° (2011)
- Record low
- 12°−11° (2018)
- Heating degree days
- 365
- Cooling degree days
- 17
New Salem in May
Highs average 75°24° and lows 53°12°, with 4.4 in112 mm of precipitation in a typical May.
- Record high
- 95°35° (2018)
- Record low
- 28°−2° (2005)
- Heating degree days
- 122
- Cooling degree days
- 94
New Salem in June
Highs average 84°29° and lows 62°17°, with 4.8 in121 mm of precipitation in a typical June.
- Record high
- 104°40° (2012)
- Record low
- 39°4° (1993)
- Heating degree days
- 14
- Cooling degree days
- 253
New Salem in July
Highs average 87°31° and lows 65°18°, with 4.5 in114 mm of precipitation in a typical July.
- Record high
- 106°41° (2012)
- Record low
- 46°8° (2013)
- Heating degree days
- 2
- Cooling degree days
- 349
New Salem in August
Highs average 86°30° and lows 63°17°, with 3.2 in82 mm of precipitation in a typical August.
- Record high
- 104°40° (2007)
- Record low
- 42°6° (1994)
- Heating degree days
- 4
- Cooling degree days
- 295
New Salem in September
Highs average 80°27° and lows 54°12°, with 3.6 in91 mm of precipitation in a typical September.
- Record high
- 103°39° (2011)
- Record low
- 24°−4° (1992)
- Heating degree days
- 72
- Cooling degree days
- 134
New Salem in OctoberThis month
Highs average 68°20° and lows 43°6°, with 3.1 in79 mm of precipitation in a typical October.
- Record high
- 93°34° (2006)
- Record low
- 19°−7° (2017)
- Heating degree days
- 329
- Cooling degree days
- 22
New Salem in November
Highs average 53°12° and lows 33°0°, with 2.8 in72 mm of precipitation and 0.9 in2.3 cm of snow in a typical November.
- Record high
- 84°29° (2016)
- Record low
- 9°−13° (2000)
- Heating degree days
- 660
- Cooling degree days
- 1
New Salem in December
Highs average 41°5° and lows 23°−5°, with 2.3 in57 mm of precipitation and 5 in13 cm of snow in a typical December.
- Record high
- 74°23° (2012)
- Record low
- −10°−23° (2016)
- Heating degree days
- 1017
- Cooling degree days
- 0