Cabo San Lucas in May

November through April delivers perfect weather – sunny days in the 80s, cool nights in the 60s. But this is also peak season, so hotels cost double and restaurants stay packed. May through October brings heat and humidity that'll knock you flat. Temperatures hit the 90s regularly and afternoon thunderstorms roll in. But hotel rates drop 50% and you'll have beaches mostly to yourself. Avoid March if you hate crowds. Spring break turns Cabo into a frat party with $15 beers and lines everywhere. College kids have every right to be here, but know what you're signing up for.