Summer days can be hot and humid with high temperatures and humidity and warm nights. Winter days range from the teens to 80 degrees, but mostly in the 50s and 60s. Night time temperatures can be near or below freezing and wind chills have reached -22 degrees.
Spring and fall are unpredictable - be prepared for any weather extreme. It is recommended that you check local forecasts before leaving. Be aware that tropical storms in the Gulf of Mexico and the Atlantic Ocean will often affect weather in the swamp.
The rainy season is normally from June through September. Many summer afternoons end with localized thunderstorms. Lightning is probably the most dangerous feature of an Okefenokee experience. If you are in an exposed area, seek shelter immediately on a nearby shrub island without trees. Get away from the boat and stay low under the canopy.
Be aware! Since the Okefenokee National Wildlife Refuge is so large (403,119 acres, over one-half the size of the State of Rhode Island) it may be raining at one entrance while sunny at another entrance.