Climate
Alpharetta weather by month
Average highs, lows, rain and snow for every month, from 30 years of weather records.
Average temperatures
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Best time to visit: April, May, October, when highs are mild and rain is lightest.
Month by month
| Month | High | Low | Rain | Wet days |
|---|---|---|---|---|
| January | 52°F | 33°F | 4.6 in | 11 |
| February | 56°F | 36°F | 4.5 in | 11 |
| March | 64°F | 42°F | 4.7 in | 11 |
| April | 73°F | 49°F | 3.9 in | 10 |
| May | 80°F | 59°F | 3.8 in | 11 |
| June | 86°F | 66°F | 4.7 in | 12 |
| July | 89°F | 70°F | 4.7 in | 12 |
| August | 88°F | 69°F | 4.5 in | 11 |
| September | 83°F | 63°F | 4.1 in | 8 |
| October | 73°F | 51°F | 3.4 in | 9 |
| November | 63°F | 41°F | 4.2 in | 9 |
| December | 54°F | 36°F | 4.4 in | 11 |
NOAA U.S. Climate Normals 1991–2020, Atlanta Peachtree Ap, Ga Us (13.4 mi away, 1,002 ft). Wet days: days with at least 0.01 in of precipitation.
Questions
What is the hottest month in Alpharetta?
July, with an average high of 89°F and low of 70°F.
What is the coldest month in Alpharetta?
January, with an average low of 33°F and high of 52°F.
When does it rain most in Alpharetta?
March is the wettest month, averaging 4.7 in of precipitation; the year totals about 51.5 inches.
What is the best time to visit Alpharetta?
For mild weather (highs between 65°F and 85°F) with the least rain, April, May, October.
Where do these numbers come from?
NOAA’s 1991–2020 U.S. Climate Normals for the Atlanta Peachtree Ap weather station, 13.4 miles from downtown: 30-year averages, not a forecast.