Portland Indiana Climate Data

Monthly Average Climate Data for Portland Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.0 °F33.5 °F2.78 in.
February20.5 °F37.6 °F2.28 in.
March29.0 °F48.1 °F2.91 in.
April39.4 °F61.6 °F4.02 in.
May50.8 °F72.3 °F4.35 in.
June60.4 °F80.9 °F4.56 in.
July63.2 °F84.2 °F4.39 in.
August60.9 °F82.5 °F3.74 in.
September53.5 °F77.2 °F3.11 in.
October42.7 °F64.9 °F2.76 in.
November32.5 °F50.4 °F3.14 in.
December24.4 °F38.5 °F2.67 in.
Annual41.3 °F61 °F40.71 in.

Climate Data for Portland Indiana

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
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
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