The July rule: CDMX is mild, not hot (days near 73°F, nights near 54°F), with a near-daily afternoon shower that usually clears in an hour or two. Pack layers and rain gear, not summer heat clothing. Bulky toiletries and diapers are cheaper to buy there, so this list keeps those light.
π Documents & money
The do-not-forget tier. Carry in a personal bag, not checked luggage.
Tourist permit reminder: nothing to pre-pay or print. Flying in, the fee is in your airfare and immigration stamps your passport on arrival. Just make sure passports are valid.
π Electronics
π Health & toiletries
Bring the meds and the kid-specific items. Toothpaste, shampoo, diapers, wipes: buy there.
π Clothing - adults (Ace & Alyssa)
A week to ten days of outfits is plenty for a month, the apartment has daily housekeeping and laundry is easy in Polanco.