Climate in Mexico
Summer, from June to October, is in theory the rainy season in Mexico, but just how wet it is varies wildly from place to place. In the heart of the country, you can expect a heavy but short-lived downpour virtually every afternoon; in the north, hardly any rain falls, ever.
Chiapas is the wettest state, with many minor roads washed out in the fall, and in the south and low-lying coastal areas summer is stickily humid too. Along the beaches, September to mid-October is hurricane season – you’ll usually get wet weather, choppy seas and mosquitoes if not a full-on tropical storm.
Though the peak tourist season is December through to April in the resorts when the climate of Mexico is dry and balmy, mountain areas can get very cold then; in fact, nights in the mountains can be extremely cold at any time of year.
Mexico rainy season
The rainy season in Mexico is, in theory, during summer (June to October). However, just how wet it is varies wildly from place to place. For much of the country, especially in the center, expect heavy, short downpours most afternoons. It also pays to plan ahead.
Surf spots like Zicatela are warm pretty much year-round, but the summer rainy season can leave the town oppressively humid, with vacant, lacklustre air. It doesn’t deter the hard-core surfers but think twice if you're a newbie.
Try and visit Cañón del Sumidero near Tuxtla in the dry season. From the boat, you will always see piles of rubbish collect along the stagnant edges of the canyons. It’s periodically rounded up and disposed of, but it’s particularly bad during the rainy season when the water is highest.
Note too that the heavy rain can wash away key infrastructure. Take Reserva de la Biósfera Sian Ka'an, the road south from Tulum is famously rutted and flooded but it's often impassable in the rainy season.