What to pack for Chiang Mai in May

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

UV index of 10 burns exposed skin in under 15 minutes at midday.

Glare off wet surfaces during and after rain strains eyes without polarization.

Jungle terrain and 71% humidity breed mosquitoes that carry dengue and malaria year-round.

Insect bites, sun exposure, and contaminated water create injuries that need immediate care.

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

Thirteen hours of daylight drain phone and camera batteries faster than one charger manages.

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

Jungle trails and daily rain mean carrying water, gear, and wet clothes on day hikes.

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 93°F.

Heat and humidity at 93°F with 71% moisture makes sweat stay on skin all day.

UV hits 10 here. Long sleeves beat reapplying sunscreen every hour.

For temples, mosques, and churches that check at the door.

Wet ground from 18 rain days and jungle terrain require footwear that drains fast.

At 13 hours of daylight with UV 10, the sun beats down relentlessly.

Sweating constantly in 93°F heat depletes electrolytes faster than water alone replaces them.

Cold water at 3pm is worth the weight.

Treat the clothes once and it lasts weeks.

Tap water isn't safe, and diarrhea from it causes dehydration in 93°F heat.

Jungle parasites and unsafe water trigger stomach illness within days of arrival.

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.

Crowded markets and guesthouses in tourist areas create theft risk for untracked bags.

Eighteen rain days soak clothes repeatedly, and hand-washing weekly beats paying laundry fees.

Motorbike taxis, market noise, and busy guesthouses create constant sound that exhausts travelers.

Highs of 93°F mean legs need protection without the weight of long pants.

Eighteen rainy days soak boots repeatedly, and spray extends their life significantly.

Lips crack and burn at UV 10, especially during the 13-hour daylight window.

Cooling towels drop core temperature when 93°F heat builds faster than air movement helps.

Dense jungle means mosquitoes swarm at dawn and dusk, even through clothing.

Tap water contamination spreads germs through hands to food and face constantly.

Sunburn and insect bites happen together in tropical sun, and most relief stings burned skin.

Multiple devices need charging daily in humidity and heat, requiring backup cable length.

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

International border crossings require passport access, and humidity warps unprotected documents quickly.

Shared guesthouse lockers and crowded transport mean bags need locks to stay secure.

Hanging bags dry toiletries faster in 71% humidity and keep them away from floor moisture.

Long flights to northern Thailand and noisy guesthouses make neck support necessary for rest.