Clarkston experiences a humid subtropical climate (Köppen climate classification *Cfa*), consistent with the greater Atlanta metropolitan area. The city enjoys four distinct seasons, though summers tend to be the most pronounced.
Summers are typically hot and humid, with average high temperatures in July and August frequently reaching the upper 80s to low 90s Fahrenheit (31-34°C). Winters are generally mild to cool, with January lows averaging around 34°F (1°C). Snowfall is rare, usually amounting to less than two inches per year, though the area is occasionally subject to winter ice storms.
Clarkston receives abundant rainfall, averaging about 50-52 inches annually, evenly distributed throughout the year. The best times to visit are during the spring (April to May) and autumn (September to October), when temperatures are moderate and the region's flora is at its most vibrant.