Arnold Missouri Climate Data

Monthly Average Climate Data for Arnold Missouri

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.6 °F40.5 °F2.76 in.
February27.0 °F45.9 °F2.46 in.
March35.8 °F55.9 °F3.66 in.
April46.4 °F68.1 °F4.81 in.
May57.0 °F76.8 °F5.22 in.
June65.9 °F85.4 °F4.56 in.
July69.7 °F88.9 °F4.09 in.
August67.7 °F87.5 °F3.61 in.
September59.6 °F81.1 °F3.37 in.
October48.2 °F69.5 °F3.33 in.
November37.0 °F55.6 °F3.62 in.
December28.5 °F44.7 °F2.82 in.
Annual47.2 °F66.7 °F44.31 in.

Climate Data for Arnold 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 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate