Kennesaw experiences a humid subtropical climate (Köppen climate classification *Cfa*), typical of the American South. This brings four distinct seasons, though summers and winters are the most pronounced.
Summers are notoriously hot and humid, with average high temperatures in July and August frequently reaching the low 90s °F (32-34 °C). Winters are generally short and mild, with average highs in January around 50 °F (10 °C) and lows occasionally dropping below freezing. Snowfall is rare, averaging only 1 to 2 inches per year, though ice storms can occasionally disrupt the region.
Rainfall is relatively abundant and evenly distributed throughout the year, averaging about 50 inches annually. The best time to visit Kennesaw is during the spring (April and May) or autumn (September to November), when temperatures are comfortable, humidity is lower, and the local foliage is vibrant.