Fort Madison Iowa Climate Data

Monthly Average Climate Data for Fort Madison Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F33.2 °F1.73 in.
February20.5 °F37.7 °F1.91 in.
March30.9 °F50.1 °F2.63 in.
April41.9 °F62.7 °F3.82 in.
May53.5 °F73.0 °F5.19 in.
June63.2 °F82.2 °F5.03 in.
July67.0 °F85.8 °F4.15 in.
August64.8 °F84.4 °F3.81 in.
September56.3 °F78.1 °F3.68 in.
October44.6 °F65.4 °F3.04 in.
November32.9 °F50.6 °F2.53 in.
December22.7 °F38.2 °F1.95 in.
Annual42.9 °F61.8 °F39.47 in.

Climate Data for Fort Madison Iowa

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation