Long Lake Illinois Climate Data

Monthly Average Climate Data for Long Lake Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.8 °F29.1 °F1.89 in.
February16.6 °F32.8 °F1.91 in.
March26.2 °F43.7 °F2.25 in.
April36.6 °F56.9 °F3.86 in.
May47.4 °F68.4 °F4.49 in.
June57.6 °F78.2 °F4.72 in.
July62.5 °F82.5 °F3.82 in.
August61.0 °F80.8 °F3.81 in.
September53.3 °F74.0 °F3.59 in.
October41.4 °F61.0 °F3.16 in.
November30.5 °F46.7 °F2.4 in.
December20.3 °F34.7 °F2.13 in.
Annual38.9 °F57.4 °F38.03 in.

Climate Data for Long Lake 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 5b : -15°F to -10°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