This map shows where weather is most comfortable across the United States during January, 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.
During January, much of the southern U.S. avoids prolonged cold outbreaks while still remaining cool enough to prevent heat or humidity discomfort. These regions often sit between Arctic air masses to the north and subtropical moisture to the south, creating long stretches of dry, mild winter weather.
Southern California’s deserts — particularly areas around the Salton Sea — stand out as the most reliable location for comfortable January weather. Mild daytime temperatures, low humidity, abundant sunshine, and minimal storm activity make this one of the best outdoor destinations in the country during mid-winter.
Arizona follows closely behind. Lower desert areas outperform higher terrain, but statewide averages remain strong throughout January thanks to dry air and frequent sunshine.
Florida ranks third overall. Winter brings cooler temperatures, reduced thunderstorm activity, and more frequent clear days. South Florida performs best, while northern portions of the state are more variable due to occasional cold fronts.
January is also a surprisingly good time to visit desert national parks. Parks like the Grand Canyon and Zion are far less crowded in January, and lower-elevation areas can offer comfortable daytime hiking conditions.
(Based on statewide average Perfect Weather Index scores.)
If you're planning outdoor activities or travel in January, the data consistently points to the desert Southwest and Florida as the most reliable destinations for comfortable weather. Outside of these regions, comfort drops quickly — especially north of the southern tier of states.
For a detailed look at how January 2025 specifically played out, see the January 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 January and may vary from year to year.