Portage Indiana Climate Data

Monthly Average Climate Data for Portage Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.3 °F32.6 °F2.44 in.
February20.8 °F36.3 °F2.14 in.
March29.3 °F46.5 °F2.31 in.
April39.2 °F58.9 °F3.59 in.
May49.7 °F69.7 °F4.12 in.
June59.6 °F79.2 °F4.64 in.
July64.4 °F83.0 °F4.18 in.
August63.2 °F81.5 °F4.02 in.
September55.7 °F75.9 °F3.48 in.
October44.3 °F63.6 °F3.98 in.
November34.1 °F49.5 °F2.84 in.
December24.2 °F37.7 °F2.27 in.
Annual41.9 °F59.5 °F40.01 in.

Climate Data for Portage Indiana

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com