Belknap Illinois Climate Data

Monthly Average Climate Data for Belknap Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January25.9 °F42.9 °F3.83 in.
February28.9 °F47.4 °F3.52 in.
March36.9 °F57.0 °F4.69 in.
April46.8 °F68.5 °F5.29 in.
May56.9 °F77.0 °F5.3 in.
June65.3 °F85.4 °F4.54 in.
July68.9 °F88.4 °F4.01 in.
August66.6 °F87.5 °F2.93 in.
September58.6 °F81.8 °F3.43 in.
October47.0 °F71.0 °F3.83 in.
November37.1 °F57.3 °F4.33 in.
December29.7 °F46.4 °F4.29 in.
Annual47.4 °F67.6 °F49.99 in.

Climate Data for Belknap Illinois

Average First Frost DateOct. 21 - Oct. 31
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 ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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