Stanley Iowa Climate Data

Monthly Average Climate Data for Stanley Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-13.3 °C-3.7 °C28.19 mm
February-11.2 °C-1.3 °C29.46 mm
March-4.4 °C6.1 °C48.51 mm
April1.9 °C14.2 °C93.73 mm
May8.6 °C20.8 °C117.6 mm
June14.7 °C26.3 °C146.56 mm
July16.3 °C27.7 °C131.32 mm
August15 °C26.6 °C101.09 mm
September10.3 °C23.3 °C93.22 mm
October3.3 °C16.1 °C71.63 mm
November-3.5 °C6.9 °C47.24 mm
December-9.6 °C-0.4 °C38.61 mm
Annual2.3 °C13.6 °C947.16 mm

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 : -31.7°C to -28.9°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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