Spring (March through May) and fall (October through November) are the most comfortable times to visit Valdosta. Temperatures are mild — typically in the 60s and 70s Fahrenheit — and the humidity that defines south Georgia summers hasn't yet arrived or has already broken. Spring also brings flowering dogwoods and azaleas to the roadsides.
Summer is genuinely punishing. June through August bring heat indexes regularly above 100°F and humidity that makes outdoor activity draining by mid-morning. If you're visiting Wild Adventures, the water park section becomes essential rather than optional. Plan outdoor activities for early morning and treat the midday hours as a reason to stay inside somewhere air-conditioned.
Winter is mild by northern standards — daytime temperatures typically reach the 50s and 60s — and freezing nights are uncommon. It's a perfectly fine time to pass through, though the city is quiet. Wild Adventures runs reduced hours outside of summer and may close entirely on weekdays in January and February; check their schedule before planning a visit around it.
There are no major annual events that would significantly affect your timing, though Valdosta State University's home football games in the fall bring traffic and fill the modest hotel supply near campus.