Riley Indiana Climate Data

Monthly Average Climate Data for Riley Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January20.5 °F36.5 °F3.17 in.
February23.4 °F41.7 °F2.54 in.
March32.5 °F52.4 °F3.42 in.
April43.1 °F64.5 °F4.95 in.
May53.5 °F74.8 °F4.72 in.
June62.3 °F83.2 °F5.15 in.
July65.4 °F86.1 °F4.31 in.
August63.1 °F84.9 °F2.84 in.
September55.3 °F79.5 °F3.25 in.
October44.0 °F67.3 °F3.74 in.
November33.7 °F53.1 °F3.69 in.
December25.4 °F41.1 °F3.03 in.
Annual43.5 °F63.8 °F44.81 in.

Climate Data for Riley 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 6a : -10°F to -5°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