Cancún Weather in August
During August, Cancún experiences very high daytime temperatures of 31°C (88°F) and cooler nights around 27°C (81°F). Expect quite a bit of rainfall. Around 116 mm (4.6 in) is typical.
Rainfall in Cancún in August
You can expect rain on around 13 days based on historical patterns, with 116 mm (4.6 in) average for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Cancún in August
Daytime highs in Cancún in August reach 31°C (88°F), with nights around 27°C (81°F). Mornings and evenings are often more comfortable than the peak afternoon hours. Nights are warm at 27°C (81°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down. Note that these temperatures are average, but some days may be hotter. Dress in cool, breathable fabrics to stay comfortable in the heat.
Sunshine in Cancún in August
Expect a lot of sunshine this month, with about 233 hours of sun. These sunny conditions add to the overall experience.
Average water temperature in August
The water is 29°C (84°F) — very warm by most standards. Comfortable to swim in, but not particularly refreshing if you're looking to cool off.Should you favor a climate that's both dry and comfortably warm, January, February, March, April, November and December typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Cancún's climate page.
Cancún Temperature in August
Min Temperature
27°C (81°F)
Max Temperature
31°C (88°F)
Water Temperature
29°C (84°F)
Chance of Rain
43%
Precipitation
116 mm (4.6 in)
Rainy days
13 days
Sunshine
233 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cancún typically stay consistent throughout August, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in August
Historical weather for Cancún in August
Browse day-by-day weather records for Cancún spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cancún historical weather extremes in August
Based on 49 years of weather observations in Cancún between 1976 and 2025, these are the recorded extremes.
- On August 14, 1977, temperatures climbed to 39°C (102°F), marking the warmest August day on record.
- The coldest August day was on August 26, 1978, with a maximum of 24°C (75°F).
- Nighttime temperatures dropped to 20°C (68°F) on August 28, 2013, marking the coldest August night on record.
Best Places in Mexico in August
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Cancún in August
Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Cancún in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Cancún's climate page.
Temperature Rainfall Sunshine Water Temp
See the full Cancún climate overview or explore weather in Mexico.
