The best time to visit Big Bend National Park is during the cooler months, from late October to early May, when the weather is most pleasant for outdoor activities.
During these months, daytime temperatures are generally mild, ranging from 60°F to 80°F, ideal for hiking, exploring the desert landscapes, and enjoying scenic drives. The nights can be cool, often dropping to 30°F or 40°F, so packing layers is advisable. This period also offers the best conditions for stargazing, as the clear desert skies are particularly dark and offer spectacular views of the Milky Way.
Families often find spring break a good time to visit, typically in March, but it's also the busiest time. If you prefer fewer crowds, consider visiting in November or early December, or late April and early May. These shoulder seasons still offer excellent weather but with fewer visitors, making for a more relaxed experience.
Summer, from June to September, is generally very hot, with temperatures often exceeding 100°F, which can make outdoor activities challenging.