Click on a day for an hourly weather forecast
The weather in Cozumel in September is hot. The average temperatures are between 22°C and 32°C.
You can expect rain for roughly half of the month of September in Cozumel. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Cozumel in September 2025.
If you’re planning to visit Cozumel in the near future, we highly recommend that you review the 14 day weather forecast for Cozumel before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 24° / 14° | 3 | 28 | 0 | 43 mm | Perfect | Cozumel in January |
| February | 26° / 15° | 3 | 25 | 0 | 41 mm | Perfect | Cozumel in February |
| March | 30° / 17° | 3 | 29 | 0 | 38 mm | Good | Cozumel in March |
| April | 34° / 20° | 2 | 28 | 0 | 38 mm | Ok | Cozumel in April |
| May | 36° / 22° | 3 | 28 | 0 | 78 mm | Ok | Cozumel in May |
| June | 35° / 23° | 7 | 23 | 0 | 179 mm | Bad | Cozumel in June |
| July | 33° / 22° | 8 | 23 | 0 | 171 mm | Ok | Cozumel in July |
| August | 34° / 22° | 6 | 25 | 0 | 160 mm | Ok | Cozumel in August |
| September | 32° / 22° | 10 | 20 | 0 | 240 mm | Ok | Cozumel in September |
| October | 30° / 19° | 5 | 26 | 0 | 160 mm | Good | Cozumel in October |
| November | 26° / 16° | 3 | 27 | 0 | 63 mm | Perfect | Cozumel in November |
| December | 25° / 15° | 2 | 29 | 0 | 30 mm | Perfect | Cozumel in December |