Climate averages 1991–2020
Cancún weather
in August.
A hot, moderately wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Cancún: daytime highs average 29.8°C and nights cool to about 26.4°C. By daytime temperature it is the warmest month of the year.
Expect about 87 mm of rain on roughly 14 days, which makes August a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 51 min on an average August day.
The nearest other city in this atlas is Playa del Carmen (65 km away). In August its highs average 30.1°C, about as warm as Cancún, with 99 mm of rain.
Among the 153 cities listed in Mexico, Cancún ranks joint 62nd of 153 for the warmest August highs and 42nd of 153 for the driest August (rainfall, lowest first). The mean August high of those 153 cities is 27.9°C; Cancún is 1.9°C warmer than that mean.
From August to September, average highs fall by 0.6°C to 29.2°C, and monthly rainfall rises from 87 mm to 162 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Cancún climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.3°C22.3°C | 22.3°C | 67 | 10.7 | 11.011 h |
| February | 26.0°C22.7°C | 22.7°C | 33 | 6.7 | 11.411 h |
| March | 26.8°C23.3°C | 23.3°C | 25 | 5.0 | 12.012 h |
| April | 28.2°C24.4°C | 24.4°C | 26 | 4.7 | 12.613 h |
| May | 29.0°C25.4°C | 25.4°C | 75 | 9.6 | 13.113 h |
| June | 29.1°C26.0°C | 26.0°C | 133 | 15.3 | 13.413 h |
| July | 29.7°C26.4°C | 26.4°C | 65 | 11.3 | 13.313 h |
| August, selected | 29.8°C26.4°C | 26.4°C | 87 | 14.3 | 12.913 h |
| September | 29.2°C25.9°C | 25.9°C | 162 | 20.2 | 12.312 h |
| October | 28.0°C25.1°C | 25.1°C | 190 | 19.1 | 11.712 h |
| November | 26.7°C24.0°C | 24.0°C | 90 | 11.7 | 11.111 h |
| December | 25.9°C23.1°C | 23.1°C | 61 | 11.4 | 10.911 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Playa del Carmen in AugustMexico · 65 kmHigh 30.1°C · Low 26.1°C · 99 mm rain
- Cozumel in AugustMexico · 76 kmHigh 29.1°C · Low 27.0°C · 107 mm rain
- Kanasín in AugustMexico · 283 kmHigh 34.5°C · Low 24.3°C · 95 mm rain
- Mérida in AugustMexico · 289 kmHigh 34.1°C · Low 24.4°C · 95 mm rain
- Chetumal in AugustMexico · 332 kmHigh 31.1°C · Low 24.9°C · 158 mm rain
- Pinar del Río in AugustCuba · 353 kmHigh 31.7°C · Low 24.4°C · 154 mm rain
- Campeche in AugustMexico · 410 kmHigh 33.2°C · Low 25.3°C · 126 mm rain
- Belmopan in AugustBelize · 480 kmHigh 30.8°C · Low 23.7°C · 126 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Cancún) is explained once on the Cancún year overview and on the Sources, method and limits page.