Click on a day for an hourly weather forecast
The weather in Sonsonate in September is hot. The average temperatures are between 22°C and 30°C.
There’s going to be many days of rain during the month of September in Sonsonate.
Sonsonate should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Sonsonate in September 2025.
If you’re planning to visit Sonsonate in the near future, we highly recommend that you review the 14 day weather forecast for Sonsonate before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 31° / 20° | 0 | 31 | 0 | 4 mm | Good | Sonsonate in January |
| February | 32° / 21° | 0 | 28 | 0 | 6 mm | Good | Sonsonate in February |
| March | 32° / 21° | 1 | 30 | 0 | 13 mm | Good | Sonsonate in March |
| April | 32° / 23° | 3 | 27 | 0 | 74 mm | Good | Sonsonate in April |
| May | 31° / 23° | 11 | 20 | 0 | 293 mm | Ok | Sonsonate in May |
| June | 30° / 22° | 12 | 18 | 0 | 305 mm | Ok | Sonsonate in June |
| July | 31° / 22° | 11 | 20 | 0 | 187 mm | Ok | Sonsonate in July |
| August | 31° / 22° | 14 | 17 | 0 | 252 mm | Ok | Sonsonate in August |
| September | 30° / 22° | 15 | 15 | 0 | 291 mm | Ok | Sonsonate in September |
| October | 30° / 21° | 13 | 18 | 0 | 284 mm | Ok | Sonsonate in October |
| November | 30° / 21° | 2 | 28 | 0 | 45 mm | Good | Sonsonate in November |
| December | 31° / 20° | 0 | 31 | 0 | 5 mm | Good | Sonsonate in December |