Newton Iowa Climate Data

Monthly Average Climate Data for Newton Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.0 °F29.2 °F0.94 in.
February16.0 °F33.9 °F1.19 in.
March26.9 °F47.0 °F2.01 in.
April38.1 °F60.7 °F3.72 in.
May50.5 °F71.4 °F4.89 in.
June60.9 °F81.0 °F5.13 in.
July64.4 °F84.4 °F4.2 in.
August61.8 °F82.4 °F4.33 in.
September53.0 °F76.5 °F3.6 in.
October40.8 °F63.2 °F2.64 in.
November28.6 °F47.7 °F1.99 in.
December18.1 °F34.7 °F1.31 in.
Annual39.3 °F59.3 °F35.95 in.

Climate Data for Newton Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°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