Boston Indiana Climate Data

Monthly Average Climate Data for Boston Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.2 °F34.6 °F3.07 in.
February20.9 °F38.6 °F2.33 in.
March29.0 °F49.1 °F3.48 in.
April39.2 °F61.8 °F4.42 in.
May50.5 °F71.4 °F4.78 in.
June59.5 °F79.8 °F4.68 in.
July61.9 °F82.5 °F3.99 in.
August59.9 °F81.6 °F3.05 in.
September52.6 °F76.0 °F3.05 in.
October41.9 °F64.1 °F3.25 in.
November32.4 °F51.1 °F3.36 in.
December24.0 °F39.1 °F3.33 in.
Annual40.8 °F60.8 °F42.79 in.

Climate Data for Boston 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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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