Wamac weather by month
What a typical year looks like in Wamac, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Salem, 24 km from Wamac; records cover 1932–2026.
The year at a glance
- Precipitation a year
- 45.9 in1166 mm
- Snow a year
- 10 in26 cm
- Last spring freeze
- Apr 7
- First fall freeze
- Oct 25
- Heating degree days
- 4,986
- Cooling degree days
- 1,328
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 3°−16° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Wamac in January
Highs average 38°4° and lows 21°−6°, with 3.1 in78 mm of precipitation and 4 in10 cm of snow in a typical January.
- Record high
- 71°22° (1943)
- Record low
- −23°−31° (1994)
- Heating degree days
- 1097
- Cooling degree days
- 0
Wamac in February
Highs average 43°6° and lows 24°−4°, with 2.6 in65 mm of precipitation and 2.5 in6.4 cm of snow in a typical February.
- Record high
- 78°26° (1962)
- Record low
- −23°−31° (1982)
- Heating degree days
- 876
- Cooling degree days
- 0
Wamac in March
Highs average 54°12° and lows 33°1°, with 3.7 in95 mm of precipitation and 0.2 in0.5 cm of snow in a typical March.
- Record high
- 90°32° (2026)
- Record low
- −8°−22° (1978)
- Heating degree days
- 669
- Cooling degree days
- 3
Wamac in April
Highs average 66°19° and lows 44°7°, with 4.7 in119 mm of precipitation in a typical April.
- Record high
- 91°33° (1987)
- Record low
- 20°−7° (1990)
- Heating degree days
- 320
- Cooling degree days
- 18
Wamac in May
Highs average 76°24° and lows 55°13°, with 5 in127 mm of precipitation in a typical May.
- Record high
- 100°38° (1944)
- Record low
- 31°−1° (1960)
- Heating degree days
- 102
- Cooling degree days
- 106
Wamac in June
Highs average 85°29° and lows 64°18°, with 5.1 in129 mm of precipitation in a typical June.
- Record high
- 104°40° (2012)
- Record low
- 38°3° (1969)
- Heating degree days
- 8
- Cooling degree days
- 282
Wamac in July
Highs average 88°31° and lows 67°20°, with 4.1 in103 mm of precipitation in a typical July.
- Record high
- 105°41° (2012)
- Record low
- 48°9° (1962)
- Heating degree days
- 0
- Cooling degree days
- 391
Wamac in August
Highs average 87°30° and lows 65°18°, with 3.8 in97 mm of precipitation in a typical August.
- Record high
- 105°41° (1983)
- Record low
- 44°7° (1964)
- Heating degree days
- 2
- Cooling degree days
- 339
Wamac in September
Highs average 80°27° and lows 57°14°, with 3.5 in90 mm of precipitation in a typical September.
- Record high
- 101°38° (2026)
- Record low
- 33°1° (1974)
- Heating degree days
- 48
- Cooling degree days
- 158
Wamac in OctoberThis month
Highs average 69°20° and lows 45°7°, with 3.4 in87 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 94°34° (2019)
- Record low
- 21°−6° (1981)
- Heating degree days
- 282
- Cooling degree days
- 29
Wamac in November
Highs average 54°12° and lows 34°1°, with 4 in101 mm of precipitation and 0.6 in1.5 cm of snow in a typical November.
- Record high
- 82°28° (1987)
- Record low
- 2°−17° (1959)
- Heating degree days
- 627
- Cooling degree days
- 2
Wamac in December
Highs average 43°6° and lows 26°−4°, with 2.9 in74 mm of precipitation and 2.9 in7.4 cm of snow in a typical December.
- Record high
- 74°23° (1982)
- Record low
- −20°−29° (1989)
- Heating degree days
- 955
- Cooling degree days
- 0