Fieldon weather by month
What a typical year looks like in Fieldon, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Jerseyville 2 SW, 14 km from Fieldon; records cover 1940–2026.
The year at a glance
- Precipitation a year
- 42.2 in1072 mm
- Snow a year
- 13 in32 cm
- Last spring freeze
- Apr 14
- First fall freeze
- Oct 17
- Heating degree days
- 5,347
- Cooling degree days
- 1,152
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 0°−18° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Fieldon in January
Highs average 36°2° and lows 19°−7°, with 2.5 in62 mm of precipitation and 4 in11 cm of snow in a typical January.
- Record high
- 74°23° (1950)
- Record low
- −25°−32° (1977)
- Heating degree days
- 1154
- Cooling degree days
- 0
Fieldon in February
Highs average 42°5° and lows 23°−5°, with 2.3 in59 mm of precipitation and 4 in9 cm of snow in a typical February.
- Record high
- 82°28° (2024)
- Record low
- −22°−30° (1979)
- Heating degree days
- 920
- Cooling degree days
- 0
Fieldon in March
Highs average 53°11° and lows 32°0°, with 3.2 in81 mm of precipitation and 1.6 in4.1 cm of snow in a typical March.
- Record high
- 93°34° (2026)
- Record low
- −11°−24° (1960)
- Heating degree days
- 710
- Cooling degree days
- 2
Fieldon in April
Highs average 65°18° and lows 42°6°, with 4.6 in116 mm of precipitation in a typical April.
- Record high
- 92°33° (1951)
- Record low
- 18°−8° (1961)
- Heating degree days
- 362
- Cooling degree days
- 15
Fieldon in May
Highs average 74°24° and lows 54°12°, with 5.3 in134 mm of precipitation in a typical May.
- Record high
- 96°36° (1953)
- Record low
- 28°−2° (1976)
- Heating degree days
- 121
- Cooling degree days
- 92
Fieldon in June
Highs average 83°28° and lows 63°17°, with 4.1 in105 mm of precipitation in a typical June.
- Record high
- 104°40° (1954)
- Record low
- 37°3° (1972)
- Heating degree days
- 14
- Cooling degree days
- 249
Fieldon in July
Highs average 87°30° and lows 66°19°, with 3.6 in90 mm of precipitation in a typical July.
- Record high
- 112°44° (1954)
- Record low
- 38°3° (1944)
- Heating degree days
- 1
- Cooling degree days
- 350
Fieldon in August
Highs average 85°30° and lows 63°17°, with 3.7 in94 mm of precipitation in a typical August.
- Record high
- 105°41° (1964)
- Record low
- 38°3° (1986)
- Heating degree days
- 4
- Cooling degree days
- 291
Fieldon in September
Highs average 79°26° and lows 55°13°, with 3.4 in87 mm of precipitation in a typical September.
- Record high
- 102°39° (1954)
- Record low
- 24°−4° (1942)
- Heating degree days
- 70
- Cooling degree days
- 129
Fieldon in OctoberThis month
Highs average 67°20° and lows 43°6°, with 3.3 in84 mm of precipitation in a typical October.
- Record high
- 93°34° (1953)
- Record low
- 17°−8° (1952)
- Heating degree days
- 326
- Cooling degree days
- 23
Fieldon in November
Highs average 53°12° and lows 33°1°, with 3.7 in93 mm of precipitation and 0.7 in1.8 cm of snow in a typical November.
- Record high
- 84°29° (1950)
- Record low
- −2°−19° (1964)
- Heating degree days
- 664
- Cooling degree days
- 1
Fieldon in December
Highs average 41°5° and lows 24°−4°, with 2.7 in67 mm of precipitation and 2.2 in5.6 cm of snow in a typical December.
- Record high
- 76°24° (2025)
- Record low
- −19°−28° (1983)
- Heating degree days
- 1001
- Cooling degree days
- 0