Blairstown Iowa Climate Data

Monthly Average Climate Data for Blairstown Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.3 °F28.1 °F1.13 in.
February14.9 °F32.8 °F1.28 in.
March26.2 °F46.0 °F2.11 in.
April37.3 °F60.2 °F3.71 in.
May49.6 °F71.2 °F4.72 in.
June60.1 °F80.6 °F5.35 in.
July63.4 °F83.9 °F4.22 in.
August60.7 °F82.1 °F4.24 in.
September51.9 °F75.9 °F3.62 in.
October39.9 °F62.8 °F2.85 in.
November27.8 °F47.1 °F2.11 in.
December17.5 °F33.7 °F1.58 in.
Annual38.4 °F58.7 °F36.92 in.

Climate Data for Blairstown 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