Portland Indiana Climate Data

Monthly Average Climate Data for Portland Indiana

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.8 °C0.8 °C70.61 mm
February-6.4 °C3.1 °C57.91 mm
March-1.7 °C8.9 °C73.91 mm
April4.1 °C16.4 °C102.11 mm
May10.4 °C22.4 °C110.49 mm
June15.8 °C27.2 °C115.82 mm
July17.3 °C29 °C111.51 mm
August16.1 °C28.1 °C95 mm
September11.9 °C25.1 °C78.99 mm
October5.9 °C18.3 °C70.1 mm
November0.3 °C10.2 °C79.76 mm
December-4.2 °C3.6 °C67.82 mm
Annual5.1 °C16.1 °C1034.03 mm

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 : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com