Brighton Illinois Climate Data

Monthly Average Climate Data for Brighton Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.6 °F37.6 °F2.5 in.
February25.0 °F43.1 °F2.22 in.
March33.9 °F53.5 °F3.23 in.
April44.6 °F65.2 °F4.64 in.
May55.5 °F74.6 °F5.11 in.
June64.6 °F83.3 °F4.12 in.
July68.0 °F86.4 °F3.73 in.
August66.1 °F85.5 °F3.65 in.
September57.6 °F79.3 °F3.3 in.
October46.1 °F67.6 °F3.26 in.
November35.1 °F53.5 °F3.36 in.
December26.3 °F42.4 °F2.61 in.
Annual45.4 °F64.3 °F41.73 in.

Climate Data for Brighton Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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