Spillertown weather by month
What a typical year looks like in Spillertown, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at CARBONDALE SEWAGE PLANT, 22 km from Spillertown; records cover 1898–2026.
The year at a glance
- Precipitation a year
- 49 in1243 mm
- Snow a year
- 11 in29 cm
- Last spring freeze
- Apr 9
- First fall freeze
- Oct 19
- Heating degree days
- 4,624
- Cooling degree days
- 1,359
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 5°−15° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Spillertown in January
Highs average 41°5° and lows 23°−5°, with 3.4 in85 mm of precipitation and 3 in8 cm of snow in a typical January.
- Record high
- 76°24° (1943)
- Record low
- −25°−32° (1977)
- Heating degree days
- 1012
- Cooling degree days
- 0
Spillertown in February
Highs average 46°8° and lows 26°−3°, with 3.1 in79 mm of precipitation and 4 in10 cm of snow in a typical February.
- Record high
- 79°26° (1982)
- Record low
- −22°−30° (1951)
- Heating degree days
- 802
- Cooling degree days
- 0
Spillertown in March
Highs average 56°13° and lows 35°1°, with 4.5 in115 mm of precipitation and 1.3 in3.3 cm of snow in a typical March.
- Record high
- 93°34° (1910)
- Record low
- −11°−24° (1978)
- Heating degree days
- 614
- Cooling degree days
- 3
Spillertown in April
Highs average 68°20° and lows 44°7°, with 5.6 in141 mm of precipitation in a typical April.
- Record high
- 92°33° (1915)
- Record low
- 20°−7° (1954)
- Heating degree days
- 294
- Cooling degree days
- 24
Spillertown in May
Highs average 77°25° and lows 55°13°, with 5.2 in132 mm of precipitation in a typical May.
- Record high
- 101°38° (1911)
- Record low
- 29°−2° (1903)
- Heating degree days
- 87
- Cooling degree days
- 113
Spillertown in June
Highs average 85°29° and lows 64°18°, with 4.6 in117 mm of precipitation in a typical June.
- Record high
- 108°42° (2012)
- Record low
- 39°4° (1917)
- Heating degree days
- 6
- Cooling degree days
- 288
Spillertown in July
Highs average 88°31° and lows 68°20°, with 4.1 in105 mm of precipitation in a typical July.
- Record high
- 112°44° (1901)
- Record low
- 42°6° (1972)
- Heating degree days
- 0
- Cooling degree days
- 398
Spillertown in August
Highs average 87°31° and lows 65°18°, with 3.2 in80 mm of precipitation in a typical August.
- Record high
- 113°45° (1930)
- Record low
- 41°5° (1902)
- Heating degree days
- 2
- Cooling degree days
- 342
Spillertown in September
Highs average 81°27° and lows 56°13°, with 3.4 in87 mm of precipitation in a typical September.
- Record high
- 108°42° (1925)
- Record low
- 20°−7° (1899)
- Heating degree days
- 52
- Cooling degree days
- 159
Spillertown in OctoberThis month
Highs average 70°21° and lows 44°7°, with 3.7 in94 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 96°36° (1922)
- Record low
- 16°−9° (1952)
- Heating degree days
- 278
- Cooling degree days
- 30
Spillertown in November
Highs average 56°13° and lows 35°2°, with 4.5 in114 mm of precipitation in a typical November.
- Record high
- 88°31° (1933)
- Record low
- −1°−18° (1929)
- Heating degree days
- 587
- Cooling degree days
- 2
Spillertown in December
Highs average 45°7° and lows 27°−3°, with 3.7 in94 mm of precipitation and 2.7 in6.9 cm of snow in a typical December.
- Record high
- 77°25° (1982)
- Record low
- −14°−26° (1989)
- Heating degree days
- 890
- Cooling degree days
- 0