Click on a day for an hourly weather forecast
The temperatures in San Salvador Island during September are extremely high, between 28°C and hot as 29°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in San Salvador Island. 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 San Salvador Island in September 2025.
If you’re planning to visit San Salvador Island in the near future, we highly recommend that you review the 14 day weather forecast for San Salvador Island before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 23° / 21° | 3 | 28 | 0 | 76 mm | Perfect | San Salvador Island in January |
| February | 23° / 22° | 3 | 26 | 0 | 69 mm | Perfect | San Salvador Island in February |
| March | 23° / 22° | 3 | 28 | 0 | 80 mm | Perfect | San Salvador Island in March |
| April | 24° / 23° | 3 | 27 | 0 | 74 mm | Perfect | San Salvador Island in April |
| May | 26° / 25° | 7 | 24 | 0 | 162 mm | Good | San Salvador Island in May |
| June | 28° / 27° | 9 | 21 | 0 | 183 mm | Good | San Salvador Island in June |
| July | 29° / 28° | 8 | 23 | 0 | 175 mm | Ok | San Salvador Island in July |
| August | 29° / 28° | 9 | 22 | 0 | 219 mm | Ok | San Salvador Island in August |
| September | 29° / 28° | 11 | 19 | 0 | 239 mm | Ok | San Salvador Island in September |
| October | 28° / 27° | 9 | 22 | 0 | 258 mm | Good | San Salvador Island in October |
| November | 26° / 24° | 4 | 26 | 0 | 111 mm | Perfect | San Salvador Island in November |
| December | 24° / 23° | 3 | 28 | 0 | 83 mm | Perfect | San Salvador Island in December |