According to scientific standards, Grovetown has a humid subtropical climate, moderate year-round with an average annual temperature of 64°F.
Summers typically consist of long spells of warm and humid weather. Average afternoon high temperatures are in the lower 90s, and readings of 90 or higher can be expected on 70 to 80 days of the year. Overnight lows usually range from the upper 60s to lower 70s.
Temperatures during winter months are more variable. Oftentimes, stretches of mild weather will alternate with cold spells. Winter high temperatures average in the mid 50s to lower 60s. Lows average in the mid 30s. Temperatures of 32°F or lower can be expected on 40 to 50 days of the year.
Spring and Autumn
Spring can be a short season in Grovetown, with pleasant weather and temperatures. Autumn is a dry season, and the month of October is usually the driest month of the year, with temperatures reaching daily highs of 77°F, which then drop at night to 50°F.
Spring and Autumn seasons are characterized by much variability from day to day and year to year. The average date of first freeze is in mid-November, and the average date of the last freeze is in mid to late March.
A measurable amount of rain falls on about 120 days each year, producing amounts averaging between 45 and 50 inches. As for snowfall, the average annual total is less than 1 inch.
Averaging over many years, the wettest month is March. Thunderstorms are common in the spring and summer months, and in a typical year, thunder will be heard on 50 to 60 days.