Everglades National Park, Florida
Southern Florida in the summertime feels like a giant swamp, with 90 percent humidity and temperatures typically hovering in the 90s F (30s C). But wintertime is the dry season and the best time to visit Everglades National Park [source: NPS].
From December until April, daytime temperatures often max out at less than 80 degrees F (27 degrees C) and lows in the 50s F (10 C) mean a jacket will keep you comfortable during your outings. Freezing temperatures almost never occur and rain is less common during winter, too. Humidity drops, and perhaps best of all, biting insects like mosquitoes are rarer and nearly disappear in some parts of the park [source: Shaw].
Birdwatching is incredibly popular at here, and many species migrate to the area to find shelter from colder temperatures up north. Because water levels drop during the dry seasons, many animal species find shelter in the wetlands, meaning your binoculars will help you view all sorts of animal species. Hiking, fishing, kayaking and wildlife watching are all popular activities made even more enjoyable thanks to the pleasant weather.
Unlike national parks in northern regions, Everglades' busy season is during winter, so that's when you'll find attractions crowded with visitors. So, be prepared to deal with peak season traffic and accommodation rates [source: National Parks Traveler].