Tolono Illinois Climate Data

Monthly Average Climate Data for Tolono Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.7 °F33.7 °F2.29 in.
February20.9 °F38.1 °F2.04 in.
March30.1 °F49.9 °F2.79 in.
April40.7 °F63.4 °F4.15 in.
May52.4 °F74.0 °F4.48 in.
June61.6 °F82.4 °F4.69 in.
July64.4 °F84.5 °F4.13 in.
August61.9 °F83.0 °F3.0 in.
September54.7 °F78.9 °F3.17 in.
October42.7 °F65.9 °F3.37 in.
November32.1 °F51.1 °F3.21 in.
December23.5 °F38.5 °F2.44 in.
Annual41.9 °F62 °F39.76 in.

Climate Data for Tolono Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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