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The weather in Isabela in September is very hot. The average temperatures are between 26°C and 29°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of September in Isabela.
Isabela 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 Isabela in September 2025.
If you’re planning to visit Isabela in the near future, we highly recommend that you review the 14 day weather forecast for Isabela before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 27° / 23° | 6 | 25 | 0 | 40 mm | Perfect | Isabela in January |
| February | 27° / 23° | 6 | 22 | 0 | 41 mm | Perfect | Isabela in February |
| March | 27° / 23° | 8 | 23 | 0 | 70 mm | Good | Isabela in March |
| April | 28° / 23° | 10 | 20 | 0 | 105 mm | Good | Isabela in April |
| May | 28° / 24° | 18 | 13 | 0 | 228 mm | Good | Isabela in May |
| June | 29° / 25° | 15 | 15 | 0 | 128 mm | Ok | Isabela in June |
| July | 29° / 26° | 15 | 16 | 0 | 122 mm | Ok | Isabela in July |
| August | 30° / 26° | 19 | 12 | 0 | 153 mm | Ok | Isabela in August |
| September | 29° / 26° | 21 | 9 | 0 | 217 mm | Ok | Isabela in September |
| October | 29° / 25° | 20 | 11 | 0 | 179 mm | Ok | Isabela in October |
| November | 28° / 25° | 15 | 15 | 0 | 158 mm | Good | Isabela in November |
| December | 27° / 24° | 7 | 25 | 0 | 52 mm | Good | Isabela in December |