Delaware Iowa Climate Data

Monthly Average Climate Data for Delaware Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.0 °F25.6 °F1.25 in.
February11.8 °F30.1 °F1.32 in.
March23.7 °F43.3 °F2.14 in.
April34.8 °F57.1 °F4.0 in.
May46.9 °F68.7 °F4.79 in.
June57.6 °F78.7 °F6.01 in.
July60.7 °F81.4 °F4.76 in.
August58.2 °F79.7 °F4.49 in.
September49.5 °F73.6 °F3.9 in.
October37.3 °F60.4 °F3.04 in.
November25.6 °F44.7 °F2.3 in.
December15.0 °F31.5 °F1.68 in.
Annual35.8 °F56.2 °F39.68 in.

Climate Data for Delaware Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation