Alpharetta Georgia Climate Data

Monthly Average Climate Data for Alpharetta Georgia

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January30.8 °F51.0 °F4.96 in.
February33.6 °F55.2 °F4.85 in.
March39.9 °F63.4 °F5.12 in.
April47.6 °F71.8 °F4.33 in.
May56.9 °F78.9 °F4.0 in.
June64.9 °F85.0 °F4.29 in.
July68.4 °F87.9 °F5.03 in.
August67.6 °F87.5 °F4.25 in.
September61.4 °F82.2 °F4.43 in.
October49.8 °F72.5 °F3.72 in.
November38.9 °F61.9 °F4.26 in.
December33.9 °F53.6 °F4.71 in.
Annual49.5 °F70.9 °F53.95 in.

Climate Data for Alpharetta Georgia

Average First Frost DateNov. 11 - Nov. 20
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost40-50 Days
Plant Hardiness Zone - 2023Zone 8a : 10°F to 15°F
Plant Hardiness Zone - 2012Zone 7b : 5°F to 10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate