Alton Indiana Climate Data

Monthly Average Climate Data for Alton Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.7 °F43.0 °F3.82 in.
February27.3 °F47.8 °F3.65 in.
March34.6 °F57.5 °F4.83 in.
April44.1 °F68.5 °F5.19 in.
May53.9 °F77.1 °F5.7 in.
June62.0 °F84.7 °F4.92 in.
July65.9 °F87.7 °F4.46 in.
August64.7 °F87.0 °F3.19 in.
September57.3 °F81.7 °F3.86 in.
October45.3 °F71.0 °F3.85 in.
November35.4 °F57.7 °F3.9 in.
December28.9 °F46.8 °F4.41 in.
Annual45.3 °F67.5 °F51.78 in.

Climate Data for Alton Indiana

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 ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate