Click on a day for an hourly weather forecast
The weather in Formosa in October is hot. The average temperatures are between 18°C and 30°C. Usually the days in October are hot while the nights are a bit cooler.
You can expect rain for roughly half of the month of October in Formosa. 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 Formosa in October 2025.
If you’re planning to visit Formosa in the near future, we highly recommend that you review the 14 day weather forecast for Formosa before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 35° / 23° | 8 | 23 | 0 | 163 mm | Bad | Formosa in January |
| February | 34° / 22° | 7 | 21 | 0 | 148 mm | Bad | Formosa in February |
| March | 32° / 20° | 7 | 24 | 0 | 158 mm | Ok | Formosa in March |
| April | 28° / 18° | 6 | 24 | 0 | 169 mm | Perfect | Formosa in April |
| May | 23° / 15° | 7 | 24 | 0 | 148 mm | Good | Formosa in May |
| June | 21° / 13° | 5 | 25 | 0 | 99 mm | Good | Formosa in June |
| July | 21° / 12° | 5 | 26 | 0 | 91 mm | Good | Formosa in July |
| August | 25° / 14° | 3 | 28 | 0 | 54 mm | Perfect | Formosa in August |
| September | 28° / 16° | 4 | 26 | 0 | 78 mm | Perfect | Formosa in September |
| October | 30° / 18° | 9 | 22 | 0 | 216 mm | Ok | Formosa in October |
| November | 32° / 19° | 8 | 22 | 0 | 212 mm | Ok | Formosa in November |
| December | 34° / 21° | 8 | 23 | 0 | 207 mm | Bad | Formosa in December |