Slidell Louisiana Climate Data

Monthly Average Climate Data for Slidell Louisiana

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January5.6 °C16.5 °C146.81 mm
February7.5 °C18.5 °C116.33 mm
March10.9 °C21.9 °C130.56 mm
April14.7 °C25.2 °C137.41 mm
May19.1 °C29 °C140.46 mm
June22.6 °C31.7 °C156.21 mm
July23.6 °C32.6 °C198.12 mm
August23.5 °C32.7 °C179.07 mm
September21.4 °C30.9 °C125.73 mm
October16 °C26.7 °C102.62 mm
November10.3 °C21.5 °C106.43 mm
December6.9 °C17.6 °C127.25 mm
Annual15.2 °C25.4 °C1667 mm

Climate Data for Slidell Louisiana

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 11 - Mar. 20
Average Days With Frost10-20 Days
Plant Hardiness Zone - 2023Zone 9a : -6.7°C to -3.9°C
Plant Hardiness Zone - 2012Zone 9a : -6.7°C to -3.9°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate