Bartonville weather by month
What a typical year looks like in Bartonville, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at General Wayne A. Downing International Airport, 4 km from Bartonville; records cover 1883–2026.
The year at a glance
- Precipitation a year
- 37.6 in954 mm
- Snow a year
- 26 in67 cm
- Last spring freeze
- Apr 14
- First fall freeze
- Oct 17
- Heating degree days
- 5,614
- Cooling degree days
- 1,157
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 95°35° (cooling, 1%).
Month by month
Bartonville in January
Highs average 34°1° and lows 18°−8°, with 2.1 in52 mm of precipitation and 8 in20 cm of snow in a typical January.
- Record high
- 71°22° (1909)
- Record low
- −27°−33° (1884)
- Heating degree days
- 1221
- Cooling degree days
- 0
Bartonville in February
Highs average 39°4° and lows 21°−6°, with 2 in51 mm of precipitation and 7 in18 cm of snow in a typical February.
- Record high
- 78°26° (2024)
- Record low
- −26°−32° (1905)
- Heating degree days
- 978
- Cooling degree days
- 0
Bartonville in March
Highs average 51°11° and lows 32°0°, with 2.7 in68 mm of precipitation and 3 in8 cm of snow in a typical March.
- Record high
- 87°31° (1907)
- Record low
- −10°−23° (1943)
- Heating degree days
- 734
- Cooling degree days
- 2
Bartonville in April
Highs average 64°18° and lows 42°6°, with 4 in101 mm of precipitation and 0.5 in1.3 cm of snow in a typical April.
- Record high
- 92°33° (1894)
- Record low
- 14°−10° (1920)
- Heating degree days
- 376
- Cooling degree days
- 12
Bartonville in May
Highs average 74°23° and lows 53°12°, with 4.7 in119 mm of precipitation in a typical May.
- Record high
- 104°40° (1934)
- Record low
- 25°−4° (1966)
- Heating degree days
- 135
- Cooling degree days
- 88
Bartonville in June
Highs average 83°28° and lows 62°17°, with 3.7 in95 mm of precipitation in a typical June.
- Record high
- 105°41° (1934)
- Record low
- 39°4° (1945)
- Heating degree days
- 13
- Cooling degree days
- 247
Bartonville in July
Highs average 86°30° and lows 66°19°, with 3.5 in90 mm of precipitation in a typical July.
- Record high
- 113°45° (1936)
- Record low
- 46°8° (1911)
- Heating degree days
- 1
- Cooling degree days
- 351
Bartonville in August
Highs average 85°29° and lows 64°18°, with 3.3 in84 mm of precipitation in a typical August.
- Record high
- 106°41° (1936)
- Record low
- 41°5° (1910)
- Heating degree days
- 3
- Cooling degree days
- 297
Bartonville in September
Highs average 78°26° and lows 56°13°, with 3.5 in88 mm of precipitation in a typical September.
- Record high
- 104°40° (1899)
- Record low
- 26°−3° (1899)
- Heating degree days
- 66
- Cooling degree days
- 137
Bartonville in OctoberThis month
Highs average 65°19° and lows 44°7°, with 3.2 in81 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 93°34° (2006)
- Record low
- 7°−14° (1925)
- Heating degree days
- 335
- Cooling degree days
- 22
Bartonville in November
Highs average 51°10° and lows 33°1°, with 2.7 in69 mm of precipitation and 1.5 in3.8 cm of snow in a typical November.
- Record high
- 81°27° (1888)
- Record low
- −2°−19° (1977)
- Heating degree days
- 694
- Cooling degree days
- 1
Bartonville in December
Highs average 39°4° and lows 23°−5°, with 2.2 in56 mm of precipitation and 6 in16 cm of snow in a typical December.
- Record high
- 71°22° (1970)
- Record low
- −24°−31° (1924)
- Heating degree days
- 1058
- Cooling degree days
- 0