Stanley Iowa Climate Data

Monthly Average Climate Data for Stanley Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.0 °F25.4 °F1.11 in.
February11.9 °F29.7 °F1.16 in.
March24.0 °F43.0 °F1.91 in.
April35.4 °F57.6 °F3.69 in.
May47.4 °F69.5 °F4.63 in.
June58.5 °F79.3 °F5.77 in.
July61.4 °F81.9 °F5.17 in.
August59.0 °F79.9 °F3.98 in.
September50.6 °F74.0 °F3.67 in.
October38.0 °F60.9 °F2.82 in.
November25.7 °F44.5 °F1.86 in.
December14.7 °F31.2 °F1.52 in.
Annual36.2 °F56.4 °F37.29 in.

Climate Data for Stanley 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 ClassificationDfb - Humid Continental Mild Summer, Wet All Year