Collinsville Illinois Climate Data

Monthly Average Climate Data for Collinsville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.5 °F39.9 °F2.74 in.
February26.9 °F45.3 °F2.43 in.
March35.7 °F55.5 °F3.51 in.
April46.4 °F67.4 °F4.93 in.
May57.2 °F76.4 °F5.27 in.
June66.1 °F85.2 °F4.9 in.
July69.9 °F88.4 °F4.31 in.
August67.9 °F87.3 °F3.8 in.
September59.6 °F80.8 °F3.34 in.
October48.3 °F69.2 °F3.27 in.
November36.7 °F55.1 °F3.72 in.
December28.2 °F44.3 °F2.79 in.
Annual47.2 °F66.2 °F45.01 in.

Climate Data for Collinsville Illinois

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 11 - Apr. 20
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