Irondale Missouri Climate Data

Monthly Average Climate Data for Irondale Missouri

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January22.4 °F41.8 °F2.67 in.
February25.5 °F47.1 °F2.65 in.
March33.6 °F56.8 °F3.88 in.
April43.8 °F68.0 °F5.29 in.
May53.8 °F75.9 °F5.38 in.
June62.1 °F83.8 °F4.12 in.
July66.4 °F87.5 °F3.9 in.
August64.4 °F87.0 °F3.55 in.
September56.4 °F80.2 °F3.37 in.
October44.7 °F69.4 °F3.38 in.
November34.4 °F56.0 °F3.95 in.
December26.6 °F45.1 °F3.02 in.
Annual44.5 °F66.6 °F45.16 in.

Climate Data for Irondale Missouri

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation