Crystal Lake Iowa Climate Data

Monthly Average Climate Data for Crystal Lake Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January6.7 °F23.7 °F0.87 in.
February11.1 °F28.3 °F0.95 in.
March23.4 °F40.8 °F1.97 in.
April35.0 °F56.5 °F3.71 in.
May47.5 °F68.9 °F4.72 in.
June58.3 °F78.7 °F5.21 in.
July61.6 °F81.7 °F4.28 in.
August58.9 °F79.4 °F3.85 in.
September50.1 °F73.3 °F3.17 in.
October37.6 °F60.1 °F2.31 in.
November25.4 °F43.2 °F1.59 in.
December13.5 °F29.3 °F1.26 in.
Annual35.8 °F55.3 °F33.89 in.

Climate Data for Crystal Lake Iowa

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