Olmsted Illinois Climate Data

Monthly Average Climate Data for Olmsted Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January26.5 °F43.2 °F3.81 in.
February29.5 °F48.1 °F3.61 in.
March37.4 °F57.8 °F4.72 in.
April47.3 °F68.6 °F5.23 in.
May57.4 °F77.4 °F5.2 in.
June65.9 °F85.8 °F4.43 in.
July69.4 °F88.8 °F3.88 in.
August67.1 °F87.6 °F2.68 in.
September59.2 °F82.0 °F3.42 in.
October47.4 °F71.2 °F3.9 in.
November37.3 °F57.6 °F4.2 in.
December30.2 °F46.7 °F4.32 in.
Annual47.9 °F67.9 °F49.4 in.

Climate Data for Olmsted Illinois

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 1 - Apr. 10
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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