This map shows where weather is most comfortable across the United States during December, based on Perfect Weather Index scores averaged across recent years.
Scores combine temperature, sunshine, humidity, and wind to highlight regions that consistently offer the most pleasant outdoor conditions for the month.
December strongly favors regions that combine mild daytime temperatures, abundant sunshine, low humidity, and minimal storm activity — a combination the desert Southwest delivers more reliably than anywhere else in the country.
Arizona leads the nation in December comfort. Cities like Phoenix and Lake Havasu City offer warm afternoons, clear skies, and very low humidity, making them among the most outdoor-friendly destinations in the country during early winter. West Texas — particularly the El Paso region — benefits from similar dry, sunny conditions.
Central Florida stands out as the best option east of the Mississippi. December is often Florida's most comfortable month, as humidity drops and temperatures settle into a pleasant range without the heat of summer. It's no coincidence that theme parks and outdoor attractions see peak comfort during this time of year.
For national park visitors, December can be an excellent time to explore desert parks like the Grand Canyon and Zion, which see mild temperatures and far fewer crowds than peak season.
(Based on statewide average Perfect Weather Index scores.)
If you're planning outdoor activities or travel in December, the data consistently points to the desert Southwest as the most reliable destination for comfortable weather. Central Florida is the best alternative for those who prefer a non-desert setting.
For a detailed look at how December 2025 specifically played out — including which cities improved or declined month-over-month — see the December 2025 weather recap.
Data Note:
This analysis is based on National Weather Service forecast data and represents modeled conditions, not verified observations. Results reflect relative comfort patterns for December and may vary from year to year.