Napoleon Indiana Climate Data

Monthly Average Climate Data for Napoleon Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.1 °F37.7 °F3.5 in.
February23.2 °F42.1 °F3.04 in.
March31.7 °F52.3 °F3.93 in.
April42.0 °F64.8 °F4.93 in.
May52.3 °F74.5 °F5.18 in.
June61.0 °F81.5 °F4.95 in.
July64.3 °F84.8 °F4.19 in.
August62.5 °F84.5 °F3.43 in.
September54.9 °F78.6 °F3.14 in.
October43.5 °F66.8 °F3.36 in.
November32.9 °F53.2 °F3.63 in.
December25.8 °F42.0 °F3.82 in.
Annual42.9 °F63.6 °F47.1 in.

Climate Data for Napoleon Indiana

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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