Mill Shoals weather by month
What a typical year looks like in Mill Shoals, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at 1 Ene Fairfield, 16 km from Mill Shoals; records cover 1896–2026.
The year at a glance
- Precipitation a year
- 46 in1168 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 11
- First fall freeze
- Oct 18
- Heating degree days
- 4,399
- Cooling degree days
- 1,547
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 4°−16° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Mill Shoals in January
Highs average 41°5° and lows 25°−4°, with 3.3 in85 mm of precipitation in a typical January.
- Record high
- 77°25° (1943)
- Record low
- −23°−31° (1977)
- Heating degree days
- 998
- Cooling degree days
- 0
Mill Shoals in February
Highs average 47°8° and lows 28°−2°, with 2.7 in68 mm of precipitation in a typical February.
- Record high
- 78°26° (1962)
- Record low
- −21°−29° (1899)
- Heating degree days
- 779
- Cooling degree days
- 0
Mill Shoals in March
Highs average 57°14° and lows 36°2°, with 4.2 in107 mm of precipitation in a typical March.
- Record high
- 91°33° (1929)
- Record low
- −8°−22° (1960)
- Heating degree days
- 575
- Cooling degree days
- 6
Mill Shoals in April
Highs average 69°21° and lows 47°8°, with 5 in127 mm of precipitation in a typical April.
- Record high
- 91°33° (1925)
- Record low
- 17°−8° (1990)
- Heating degree days
- 251
- Cooling degree days
- 34
Mill Shoals in May
Highs average 78°26° and lows 56°13°, with 5 in126 mm of precipitation in a typical May.
- Record high
- 98°37° (1911)
- Record low
- 29°−2° (1903)
- Heating degree days
- 76
- Cooling degree days
- 138
Mill Shoals in June
Highs average 87°31° and lows 64°18°, with 4.7 in119 mm of precipitation in a typical June.
- Record high
- 108°42° (2012)
- Record low
- 39°4° (1972)
- Heating degree days
- 5
- Cooling degree days
- 322
Mill Shoals in July
Highs average 90°32° and lows 68°20°, with 3.8 in97 mm of precipitation in a typical July.
- Record high
- 113°45° (1901)
- Record low
- 45°7° (1911)
- Heating degree days
- 0
- Cooling degree days
- 425
Mill Shoals in August
Highs average 89°32° and lows 66°19°, with 3.5 in89 mm of precipitation in a typical August.
- Record high
- 108°42° (1918)
- Record low
- 43°6° (1986)
- Heating degree days
- 1
- Cooling degree days
- 379
Mill Shoals in September
Highs average 83°28° and lows 58°14°, with 2.9 in74 mm of precipitation in a typical September.
- Record high
- 105°41° (1939)
- Record low
- 25°−4° (1899)
- Heating degree days
- 38
- Cooling degree days
- 196
Mill Shoals in OctoberThis month
Highs average 71°21° and lows 47°8°, with 3.7 in95 mm of precipitation in a typical October.
- Record high
- 96°36° (1939)
- Record low
- 19°−7° (1952)
- Heating degree days
- 238
- Cooling degree days
- 44
Mill Shoals in November
Highs average 56°13° and lows 36°2°, with 3.8 in97 mm of precipitation in a typical November.
- Record high
- 86°30° (2016)
- Record low
- −3°−19° (1929)
- Heating degree days
- 567
- Cooling degree days
- 3
Mill Shoals in December
Highs average 45°7° and lows 29°−2°, with 3.3 in84 mm of precipitation in a typical December.
- Record high
- 74°23° (1916)
- Record low
- −18°−28° (1989)
- Heating degree days
- 871
- Cooling degree days
- 0