Lexington Illinois Climate Data

Monthly Average Climate Data for Lexington Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.2 °F32.5 °F2.15 in.
February19.6 °F37.3 °F1.82 in.
March29.0 °F49.4 °F2.58 in.
April39.8 °F62.7 °F3.7 in.
May51.5 °F73.8 °F4.34 in.
June61.0 °F82.3 °F3.96 in.
July64.2 °F85.2 °F3.75 in.
August62.0 °F83.4 °F3.33 in.
September54.0 °F78.3 °F3.3 in.
October42.7 °F65.5 °F3.47 in.
November31.6 °F50.3 °F2.56 in.
December22.0 °F37.7 °F1.92 in.
Annual41.1 °F61.5 °F36.88 in.

Climate Data for Lexington Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com