Fairfax Virginia Climate Data

Monthly Average Climate Data for Fairfax Virginia

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January25.1 °F43.0 °F2.94 in.
February26.7 °F46.3 °F2.63 in.
March33.4 °F54.8 °F3.72 in.
April43.4 °F66.5 °F3.27 in.
May53.0 °F74.6 °F4.38 in.
June62.2 °F83.0 °F4.46 in.
July67.0 °F87.3 °F4.55 in.
August65.2 °F85.6 °F3.47 in.
September58.6 °F79.1 °F4.24 in.
October46.3 °F67.5 °F3.67 in.
November35.9 °F56.9 °F3.11 in.
December29.2 °F47.0 °F3.66 in.
Annual45.5 °F66 °F44.1 in.

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 : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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