Click on a day for an hourly weather forecast
The temperatures in Isla Mujeres during September are extremely high, between 27°C and hot as 31°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Isla Mujeres. 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 Isla Mujeres in September 2025.
If you’re planning to visit Isla Mujeres in the near future, we highly recommend that you review the 14 day weather forecast for Isla Mujeres before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 26° / 22° | 4 | 27 | 0 | 101 mm | Perfect | Isla Mujeres in January |
| February | 27° / 23° | 2 | 26 | 0 | 56 mm | Perfect | Isla Mujeres in February |
| March | 27° / 23° | 2 | 29 | 0 | 43 mm | Perfect | Isla Mujeres in March |
| April | 29° / 25° | 3 | 27 | 0 | 61 mm | Good | Isla Mujeres in April |
| May | 30° / 26° | 6 | 25 | 0 | 141 mm | Good | Isla Mujeres in May |
| June | 30° / 27° | 10 | 20 | 0 | 216 mm | Ok | Isla Mujeres in June |
| July | 31° / 27° | 7 | 24 | 0 | 126 mm | Ok | Isla Mujeres in July |
| August | 31° / 27° | 9 | 22 | 0 | 178 mm | Ok | Isla Mujeres in August |
| September | 31° / 27° | 12 | 18 | 0 | 209 mm | Ok | Isla Mujeres in September |
| October | 29° / 26° | 10 | 21 | 0 | 250 mm | Ok | Isla Mujeres in October |
| November | 28° / 24° | 5 | 25 | 0 | 138 mm | Perfect | Isla Mujeres in November |
| December | 27° / 23° | 3 | 28 | 0 | 97 mm | Perfect | Isla Mujeres in December |