Alto Pass Illinois Climate Data

Monthly Average Climate Data for Alto Pass Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.6 °F41.8 °F3.51 in.
February27.5 °F47.0 °F3.18 in.
March36.3 °F56.5 °F4.58 in.
April46.2 °F67.5 °F5.43 in.
May56.0 °F76.0 °F5.68 in.
June64.3 °F84.7 °F4.89 in.
July68.2 °F86.9 °F4.04 in.
August65.9 °F86.6 °F3.24 in.
September58.0 °F80.8 °F3.4 in.
October47.0 °F70.0 °F3.76 in.
November36.9 °F56.4 °F4.55 in.
December27.9 °F45.3 °F3.85 in.
Annual46.6 °F66.6 °F50.11 in.

Climate Data for Alto Pass Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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