Cancún (Riviera Maya) weather in July
July in Cancún: sweltering, rainy, with muggy air — fine if you can take 37°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#8 of 12 months in Cancún · #471 of 1413 destinations to visit in July · comfort 85/100 (tier A)
- Days
- 32°C
- Nights
- 26°C
- Wet days
- 16
- Sun
- 11.8 h
- Humidity
- 79%
- Daylight
- 13 h

What July is like in Cancún
Hot, wet and humid, with whale-shark season at its peak and sargassum often heavy along the beaches.
monsoonlow season
confidence: high
Traveller notes on Cancún in July
Other months in Cancún
Regulars are consistent this month can turn sunny and hot for a stretch, then briefly cloudy and cool when a cold front passes through, before swinging back to sunny and hot again within a day or two. Our row backs that warm, still-showery read, 27.7C reading as a hot 30C, over 21.5C nights, with 30.1mm of rain across 7.4 days and humidity at 73 percent. Regulars are specific that tropical showers here tend to last only 5-10 minutes rather than settling in, and that packing a light sweater for cooler evenings is worth it even on an otherwise warm trip. The sea sits at a warm, swimmable 26.8C regardless of which version of the day arrives. The record: 9.8 hours of sun, a 20.4 kph wind and AQI 47.
Cancun-forum threads asking about August hurricane season are consistent the odds of an actual storm hitting are low through most of the month, ticking up only toward the very end as the wider season builds toward its September-October peak. A typical day is described as sunny, hot and humid, with forecasts often calling for rain that doesn't necessarily show up - and when it does arrive, it's usually overnight or a brief afternoon burst rather than an all-day washout. Posters call the ocean warm enough to feel almost bath-like, a genuine plus for anyone prioritizing swimming and snorkeling over cooler water. Regulars are consistent that most August trips proceed entirely normally, and recommend simply keeping half an eye on the tropical outlook rather than avoiding the month outright. The record: 31.8C days feeling like a punishing 37C, 25.2C nights, a 28.5C sea and 80 percent humidity.
Cancun-forum threads on September weather confirm it's sunny and hot with high humidity most days, a typical afternoon high around 32C that feels considerably warmer given the moisture in the air. September sits squarely in hurricane season and is one of the two busiest months for tropical activity, but posters are consistent that forecasts calling for rain and storms every day rarely match the actual experience - genuine all-day washouts are called rare, with rain more typically landing overnight or as a brief afternoon burst. Regulars recommend travel insurance covering storms as a sensible precaution, even though the odds of a direct hit on any specific week are described as slim. The clear upside: noticeably lower rates and thinner crowds than the winter high season. The record: 31.3C days feeling like a punishing 37C, 24.8C nights, 175mm across 23.3 days, 82 percent humidity, a 29.9C sea and 10.5 hours of sun.
April in Cancun is dry, hot and squarely inside the worst of the sargassum. Regulars put the peak at April through June, arriving daily and in quantity, varying by the day and by the stretch of beach; their mitigation is geography - it thins going north towards Costa Mujeres, the western shore of Isla Mujeres sees less, and many hotels rake their frontage each morning. Lent can also be very windy here, which our row's 20.9 kph reflects. The other April question is spring break: most American school breaks fall in the last two weeks of March, and the consensus is that Cancun is big enough to dilute them. The record: 29.5C days that feel like 33C, 23.7C nights, 5.7 precipitation days carrying 31.7mm and a 27.2C sea.
Year-round notes are on Cancún's overview. Add your own note from Cancún's card on the map.
Cancún climate normals — July
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Cancún in July
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Quietthe editor's quiet month, Mexican summer holidays, school holidays in 3 of the markets that fill it
Peak crowdsBusyShoulder seasonQuiet
Best months for Cancún's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherCancún's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Cancún in July
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Visitor tax and park fees
1 Jan – 31 DecQuintana Roo charges every foreign visitor a state tourism fee, paid online before you fly out, and the marine parks off Isla Mujeres and Cozumel add their own per-day charge on the boat. Source ↗
- Season
Sargassum season
1 Apr – 30 Sep · usuallyRiskRafts of brown seaweed pile up on the east-facing beaches, worst between May and August. It rots fast and smells, hotels rake it at dawn, and the north-facing beaches at Isla Mujeres usually escape it. Source ↗
- Nature
Sea turtle nesting
1 May – 31 Oct · usuallyLoggerheads and greens come up the hotel-zone beaches at night through the summer and the hatchlings run from August. Beach lighting is dimmed and the nests are fenced; the releases are run by the hotels. Source ↗
- Hazard
Hurricane season
1 Jun – 30 NovThe Atlantic season runs June to November, with most activity between mid-August and mid-October. Source ↗
- Nature
Whale sharks off Isla Mujeres
15 Jun – 15 SepDive seasonBook earlyHundreds of whale sharks gather to feed north of Isla Mujeres and the permitted swim season runs from mid-June to mid-September, July being the densest. It is a three-hour boat day in open water, often a rough one. Source ↗
- Holiday
Mexican summer holidays
15 Jul – 31 Aug · usuallySchool holidaysCrowdedDomestic school holidays fill the hotel zone with Mexican families, which is a different and cheaper crowd than spring break but the same queue at Xcaret. Source ↗
Nearby, and something's on
Within 300 km of Cancún — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Cancún?
Cancún in July — FAQ
- Is July a good time to visit Cancún?
- July in Cancún: sweltering, rainy, with muggy air — fine if you can take 37°C afternoons. It ranks #8 of 12 months for Cancún on SeasonMap's comfort score (85/100).
- What is the weather like in Cancún in July?
- In July, Cancún averages a daily high of 31.8°C and a low of 25.5°C, with about 86.9 mm of rain over roughly 15.8 rainy days.
- What is the air quality in Cancún in July?
- Cancún has a mean US Air Quality Index of about 63 in July.
Within 300 km: Isla Mujeres' Whale shark season on 15 May – 17 Sep, and Holbox's Whale shark season on 15 May – 17 Sep.