Climate averages 1991–2020
Cozumel weather
in August.
A hot, wet month: the warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Cozumel: daytime highs average 29.1°C and nights cool to about 27.0°C. By daytime temperature it is the warmest month of the year.
Expect about 107 mm of rain on roughly 16 days, which makes August a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 50 min on an average August day.
The nearest other city in this atlas is Playa del Carmen (20 km away). In August its highs average 30.1°C, 1.0°C warmer than Cozumel, with 99 mm of rain.
Among the 153 cities listed in Mexico, Cozumel ranks 70th of 153 for the warmest August highs and joint 61st of 153 for the driest August (rainfall, lowest first). The mean August high of those 153 cities is 27.9°C; Cozumel is 1.2°C warmer than that mean.
From August to September, average highs fall by 0.3°C to 28.8°C, and monthly rainfall rises from 107 mm to 179 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
Cozumel climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.3°C23.4°C | 23.4°C | 64 | 11.6 | 11.011 h |
| February | 25.7°C23.8°C | 23.8°C | 28 | 6.9 | 11.511 h |
| March | 26.3°C24.3°C | 24.3°C | 26 | 5.7 | 12.012 h |
| April | 27.3°C25.3°C | 25.3°C | 29 | 5.7 | 12.613 h |
| May | 28.1°C26.1°C | 26.1°C | 84 | 11.1 | 13.113 h |
| June | 28.5°C26.6°C | 26.6°C | 168 | 17.4 | 13.413 h |
| July | 28.9°C27.0°C | 27.0°C | 82 | 14.1 | 13.213 h |
| August, selected | 29.1°C27.0°C | 27.0°C | 107 | 16.2 | 12.813 h |
| September | 28.8°C26.6°C | 26.6°C | 179 | 21.1 | 12.312 h |
| October | 27.9°C25.9°C | 25.9°C | 215 | 19.7 | 11.712 h |
| November | 26.7°C24.9°C | 24.9°C | 103 | 12.9 | 11.211 h |
| December | 25.9°C24.1°C | 24.1°C | 66 | 11.7 | 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 · 20 kmHigh 30.1°C · Low 26.1°C · 99 mm rain
- Cancún in AugustMexico · 76 kmHigh 29.8°C · Low 26.4°C · 87 mm rain
- Chetumal in AugustMexico · 262 kmHigh 31.1°C · Low 24.9°C · 158 mm rain
- Kanasín in AugustMexico · 276 kmHigh 34.5°C · Low 24.3°C · 95 mm rain
- Mérida in AugustMexico · 284 kmHigh 34.1°C · Low 24.4°C · 95 mm rain
- Campeche in AugustMexico · 380 kmHigh 33.2°C · Low 25.3°C · 126 mm rain
- Pinar del Río in AugustCuba · 398 kmHigh 31.7°C · Low 24.4°C · 154 mm rain
- Belmopan in AugustBelize · 409 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 Cozumel) is explained once on the Cozumel year overview and on the Sources, method and limits page.