Winter temperatures hover in the 70s while daily averages hit low-triple digits in the summer months, especially July. You're in the desert, afterall, so expect warm winters, hot summers, and a downright good time.
Flights into Palm Springs International Airport (PSP) are the most convenient way to reach Coachella Valley if you're coming from outside of Southern California, or you can also fly into larger airports LAX or SAN. Rent a car to make the two hour drive to Coachella Valley, and to hop around the scenic destinations around the region, including Joshua Tree National Park.