The climate in 30009 Alpharetta, GA is warm and humid, with mild winters and hot, humid summers. The average annual temperature in the city is around 60°F (15°C), with an average low of roughly 48°F (9°C) in the winter months and an average high of 72°F (22°C) during the summer months. Rainfall is abundant year round, averaging almost 50 inches per year. Snow is a rarity in this area; instead, it is more likely to experience strong thunderstorms during the hot summer months.
Alpharetta (zip 30009), Georgia gets 53 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Alpharetta (zip 30009) averages 2 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 217 sunny days per year in Alpharetta (zip 30009). The US average is 205 sunny days.
Alpharetta (zip 30009) gets some kind of precipitation, on average, 107 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 88 degrees
Winter Low: the January low is 30
Rain: averages 53 inches of rain a year
Snow: averages 2 inches of snow a year