Graf Iowa Climate Data

Monthly Average Climate Data for Graf Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.1 °C-2.8 °C32.26 mm
February-10.2 °C-0.3 °C36.83 mm
March-3.7 °C6.9 °C53.59 mm
April2.5 °C14.6 °C97.79 mm
May9 °C21.1 °C117.35 mm
June14.8 °C26.3 °C149.1 mm
July16.8 °C28.1 °C122.43 mm
August15.6 °C27.1 °C105.66 mm
September10.7 °C23.4 °C98.3 mm
October4.1 °C16.2 °C74.17 mm
November-2.3 °C7.5 °C57.91 mm
December-8.3 °C0.4 °C43.18 mm
Annual3.1 °C14 °C988.57 mm

Climate Data for Graf Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5a : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2025 plantmaps.com