Click on a day for an hourly weather forecast
The temperatures in Mazatlan 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 Mazatlan. 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 Mazatlan in September 2025.
If you’re planning to visit Mazatlan in the near future, we highly recommend that you review the 14 day weather forecast for Mazatlan before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 25° / 19° | 1 | 30 | 0 | 11 mm | Perfect | Mazatlan in January |
| February | 25° / 19° | 1 | 27 | 0 | 25 mm | Perfect | Mazatlan in February |
| March | 26° / 20° | 0 | 31 | 0 | 5 mm | Perfect | Mazatlan in March |
| April | 27° / 21° | 0 | 30 | 0 | 0 mm | Perfect | Mazatlan in April |
| May | 29° / 24° | 0 | 31 | 0 | 5 mm | Good | Mazatlan in May |
| June | 30° / 26° | 2 | 28 | 0 | 91 mm | Good | Mazatlan in June |
| July | 31° / 27° | 10 | 21 | 0 | 164 mm | Ok | Mazatlan in July |
| August | 31° / 27° | 16 | 15 | 0 | 268 mm | Ok | Mazatlan in August |
| September | 31° / 27° | 12 | 18 | 0 | 279 mm | Ok | Mazatlan in September |
| October | 30° / 25° | 4 | 27 | 0 | 96 mm | Good | Mazatlan in October |
| November | 29° / 23° | 1 | 29 | 0 | 66 mm | Good | Mazatlan in November |
| December | 26° / 20° | 1 | 30 | 0 | 25 mm | Perfect | Mazatlan in December |