Guadalajara in October

October through April gives you perfect weather — sunny days around 75°F and cool nights that actually require a light jacket. This is peak mariachi season too, with festivals happening monthly in the historic center. December and January are ideal but crowded. Las Posadas celebrations fill the streets with processions, and New Year's Eve in Plaza de Armas gets wild. Book accommodations early during this period — prices jump 40-50%. May through September brings rain and heat. Afternoon thunderstorms are common, but they cool things down. You'll find better hotel deals and fewer crowds, plus the city looks incredibly green. Just pack an umbrella and embrace the slower pace. Avoid Easter week unless you're into massive crowds. The entire city seems to migrate to the beaches, but those staying behind party hard in the historic center.