Alpharetta (GA) Weather and Climate: A Comprehensive Guide
The climate in Alpharetta is marked by big temperature swings throughout the year.
Temperatures range from very warm during the warmest months
to cold in the cooler months.
It also experiences much rain/snowfall throughout the year.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
In Alpharetta, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a very warm 31°C in July. In January, the coolest month of the year, temperatures drop to a chilly 10°C.
At night, you can expect cooler temperatures, with averages dropping to around -1°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Alpharetta experiences significant rain/snowfall throughout the year, averaging 1245 mm of precipitation annually. Alpharetta experiences moderate seasonal variation in rainfall, with monthly averages ranging from 144 mm in December, the wettest month, and 78 mm in June, the driest month.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Alpharetta can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 9.6 hours of sunshine daily. In contrast, the city experiences much darker days in January, with only 5.5 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Alpharetta.
The city experiences its highest humidity in August, reaching 75%. In April, the humidity drops to its lowest level at 61%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
overcast and no rain overcast and rain overcast and rainForecast for Alpharetta (GA)
5 m/s
4 m/s
3 m/s
The best time of year to visit Alpharetta in the United States of America
During the months of April and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
August has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 10°C.
December tops the wettest month list with 144 mm of rainfall.
June is the driest month with 78 mm of precipitation.
May is the sunniest month with an average of 288 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
