Florence weather by month
What a typical year looks like in Florence, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Pittsfield No 2, 16 km from Florence; records cover 1995–2026.
The year at a glance
- Precipitation a year
- 40.5 in1029 mm
- Snow a year
- 16 in40 cm
- Last spring freeze
- Apr 14
- First fall freeze
- Oct 22
- Heating degree days
- 5,302
- Cooling degree days
- 1,251
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −2°−19° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Florence in January
Highs average 37°3° and lows 19°−7°, with 2 in52 mm of precipitation and 4 in10 cm of snow in a typical January.
- Record high
- 71°22° (2004)
- Record low
- −25°−32° (1999)
- Heating degree days
- 1162
- Cooling degree days
- 0
Florence in February
Highs average 42°5° and lows 22°−5°, with 2.1 in54 mm of precipitation and 5 in13 cm of snow in a typical February.
- Record high
- 79°26° (2024)
- Record low
- −18°−28° (1996)
- Heating degree days
- 921
- Cooling degree days
- 0
Florence in March
Highs average 53°12° and lows 32°0°, with 3 in75 mm of precipitation and 1.7 in4.3 cm of snow in a typical March.
- Record high
- 83°28° (2012)
- Record low
- −7°−22° (2014)
- Heating degree days
- 708
- Cooling degree days
- 3
Florence in April
Highs average 66°19° and lows 42°6°, with 4.1 in105 mm of precipitation and 0.3 in0.8 cm of snow in a typical April.
- Record high
- 90°32° (2011)
- Record low
- 18°−8° (2018)
- Heating degree days
- 349
- Cooling degree days
- 22
Florence in May
Highs average 75°24° and lows 54°12°, with 4.8 in123 mm of precipitation in a typical May.
- Record high
- 96°36° (2018)
- Record low
- 29°−2° (2005)
- Heating degree days
- 116
- Cooling degree days
- 105
Florence in June
Highs average 84°29° and lows 63°17°, with 5 in127 mm of precipitation in a typical June.
- Record high
- 103°39° (2012)
- Record low
- 44°7° (1996)
- Heating degree days
- 12
- Cooling degree days
- 268
Florence in July
Highs average 88°31° and lows 66°19°, with 4.1 in104 mm of precipitation in a typical July.
- Record high
- 104°40° (2012)
- Record low
- 50°10° (1996)
- Heating degree days
- 2
- Cooling degree days
- 367
Florence in August
Highs average 87°30° and lows 64°18°, with 3.4 in87 mm of precipitation in a typical August.
- Record high
- 104°40° (2007)
- Record low
- 45°7° (2004)
- Heating degree days
- 2
- Cooling degree days
- 315
Florence in September
Highs average 80°27° and lows 55°13°, with 3.6 in92 mm of precipitation in a typical September.
- Record high
- 97°36° (2013)
- Record low
- 33°1° (2012)
- Heating degree days
- 68
- Cooling degree days
- 141
Florence in OctoberThis month
Highs average 68°20° and lows 44°7°, with 3 in76 mm of precipitation in a typical October.
- Record high
- 93°34° (2018)
- Record low
- 24°−4° (2023)
- Heating degree days
- 312
- Cooling degree days
- 28
Florence in November
Highs average 54°12° and lows 33°1°, with 2.9 in74 mm of precipitation and 1.1 in2.8 cm of snow in a typical November.
- Record high
- 84°29° (2016)
- Record low
- 6°−14° (2019)
- Heating degree days
- 646
- Cooling degree days
- 2
Florence in December
Highs average 42°5° and lows 24°−5°, with 2.3 in59 mm of precipitation and 3 in9 cm of snow in a typical December.
- Record high
- 73°23° (2012)
- Record low
- −10°−23° (2022)
- Heating degree days
- 1004
- Cooling degree days
- 0