Fairfax Virginia Climate Data

Monthly Average Climate Data for Fairfax Virginia

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-3.8 °C6.1 °C74.68 mm
February-2.9 °C7.9 °C66.8 mm
March0.8 °C12.7 °C94.49 mm
April6.3 °C19.2 °C83.06 mm
May11.7 °C23.7 °C111.25 mm
June16.8 °C28.3 °C113.28 mm
July19.4 °C30.7 °C115.57 mm
August18.4 °C29.8 °C88.14 mm
September14.8 °C26.2 °C107.7 mm
October7.9 °C19.7 °C93.22 mm
November2.2 °C13.8 °C78.99 mm
December-1.6 °C8.3 °C92.96 mm
Annual7.5 °C18.9 °C1120.14 mm

Climate Data for Fairfax Virginia

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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