Click on a day for an hourly weather forecast
The weather in San Juan del Sur in September is very hot. The average temperatures are between 25°C and 30°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in San Juan del Sur. 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 Juan del Sur in September 2025.
If you’re planning to visit San Juan del Sur in the near future, we highly recommend that you review the 14 day weather forecast for San Juan del Sur before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 29° / 24° | 0 | 31 | 0 | 31 mm | Good | San Juan del Sur in January |
| February | 30° / 24° | 0 | 28 | 0 | 19 mm | Good | San Juan del Sur in February |
| March | 31° / 24° | 0 | 31 | 0 | 16 mm | Good | San Juan del Sur in March |
| April | 32° / 26° | 1 | 29 | 0 | 41 mm | Good | San Juan del Sur in April |
| May | 31° / 26° | 6 | 25 | 0 | 197 mm | Good | San Juan del Sur in May |
| June | 30° / 26° | 9 | 21 | 0 | 239 mm | Ok | San Juan del Sur in June |
| July | 30° / 26° | 9 | 22 | 0 | 232 mm | Ok | San Juan del Sur in July |
| August | 30° / 25° | 8 | 23 | 0 | 251 mm | Ok | San Juan del Sur in August |
| September | 30° / 25° | 8 | 22 | 0 | 233 mm | Ok | San Juan del Sur in September |
| October | 29° / 25° | 11 | 20 | 0 | 333 mm | Ok | San Juan del Sur in October |
| November | 29° / 25° | 5 | 25 | 0 | 160 mm | Good | San Juan del Sur in November |
| December | 29° / 24° | 1 | 30 | 0 | 69 mm | Good | San Juan del Sur in December |