Historical weather data, all-time temperature records, and monthly climate averages for Smyrna, GA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Smyrna typically lands in comfortable spring territory, with average highs of 66° and lows around 46°. This date has a wide temperature range in the record books though — from a frigid 34° low back in 1951 all the way up to an 86° high just this year in 2025. Rain is a coin-flip, with a 43% chance of precipitation historically.
Smyrna's weather has some real extremes on the books — a scorching 102° in July 1952 on one end, and a brutal -4° in January 1963 on the other, a 106-degree spread between the all-time high and low. The wettest single day on record dumped 4.45 inches of rain on October 3, 1962, and the snowiest dropped 4 inches back in February 1952.
Smyrna runs hot and humid from late June through August, peaking with average highs of 90° during the last week of July. If you're avoiding the heat, December through February is the sweet spot, with highs in the low-to-mid 50s. Rainfall is fairly spread throughout the year, but mid-July is statistically the wettest stretch, averaging over an inch of precipitation in a single week.