What to pack for Cancun in October

22 rain days a month finds every seam. A real shell, not a windbreaker.

UV index of 7.8 burns skin in 15 minutes without protection.

Glare off water and wet pavement at midday turns eyes into pain points.

October's humidity and coastal location bring mosquitoes that carry dengue and zika.

Tap water isn't safe here, and cuts from coral reefs get infected fast.

Tap water isn't safe here. A filter bottle beats buying plastic twice a day.

Eleven hours of daylight and trips to the national park mean your phone dies before sunset without backup power.

Set it up before you land. Signal drops for long stretches outside cities.

22 rain days soak checked bags, so carry everything you need on board.

Day trips to the national park and beach require a separate pack for water and sun gear.

Fits the overhead on every airline that matters. Skip the checked-bag line entirely.

For the passport, the chargers, and the one dry pair of socks.

Anything heavier than linen is a mistake at 84°F.

22 rain days and 81% humidity mean sweat dries slowly on skin.

UV hits 7.8 here. Long sleeves beat reapplying sunscreen every hour.

Stinger season brings jellyfish to the water, and locals swim in protective gear.

Wet terrain and coastal spray demand footwear that drains and won't rot.

11.7 hours of daylight at a UV index of 7.8 means unrelenting sun exposure.

Cold water at 3pm is worth the weight.

Treat the clothes once and it lasts weeks.

Heat and humidity trigger dehydration that electrolytes alone won't fix.

Unsafe water means traveler's diarrhea hits most visitors within the first week.

One brick charges the laptop, phone, and camera.

Hotel and cafe wifi is shared with everyone else in the building. A VPN keeps your banking and email to yourself.

International destination with petty theft means cash and cards need a secure place.

High-traffic tourist zone with crowded buses and markets makes bag tracking essential.

Moisture and salt air degrade loose clothes, but cubes keep items compressed and dry.

81% humidity and rain 22 days a month destroy electronics without waterproof housing.

Treating clothes once with a wash additive lets you wear them for weeks in wet heat.

High of 84°F with rain most days calls for quick-drying fabric that sheds water.

Waterproofing fails when 22 days of rain soak through seams and creases.

Lips crack and burn faster than body skin in this heat and humidity.

Wet hands and surfaces breed bacteria in 81% humidity and no clean tap water.

Sunburn and insect bites both need treatment, but most itch relief stings badly.

One outlet at the guesthouse charges multiple devices if you bring short cables.

A few phrases go a long way. Ten minutes a day before you leave is plenty.

Coastal urban area near a national park requires your passport for park entry.

International travel and shared guesthouse spaces mean locks protect your gear.

Toiletries mildew fast in 81% humidity unless hung up to air between uses.