The park is always open and may be visited anytime of year. Visitation increases as temperatures moderate in the fall, peaks during spring wildflower season, and diminishes during the heat of summer. 

Weather and Climate
Days are typically clear with less than 25 precent humidity. Temperatures are most comfortable in the spring and fall, with an average high/low of 85 and 50°F (29 and 10°C) respectively. Winter brings cooler days, around 60°F (15°C), and freezing nights. It occasionally snows at higher elevations. Summers are hot, over 100°F (38°C) during the day and not cooling much below 75°F (24°C) until the early hours of the morning.

Oasis Visitor Center
Open All Year
8 a.m. to 5 p.m.
Located at park headquarters in Twentynine Palms, at the junction of Utah Trail and National Park Drive.

Joshua Tree Visitor Center
Open All Year
8 a.m. to 5 p.m.
Located one block south of Hwy 62 (Twentynine Palms Highway) on Park Boulevard in Joshua Tree Village.

Cottonwood Visitor Center
Open All Year
9 a.m. to 3 p.m.
Located eight miles north of Interstate 10 at Cottonwood Spring.

Black Rock Nature Center
Open October through May
8 a.m. to 4 p.m. except on Friday
Noon to 8 p.m. on Friday
Located in Black Rock Campground.