Click on a day for an hourly weather forecast
The weather in Penang in September is very hot. The average temperatures are between 26°C and 30°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Penang. 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 Penang in September 2025.
If you’re planning to visit Penang in the near future, we highly recommend that you review the 14 day weather forecast for Penang before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 25° | 9 | 22 | 0 | 169 mm | Ok | Penang in January |
| February | 31° / 25° | 6 | 22 | 0 | 118 mm | Good | Penang in February |
| March | 31° / 26° | 9 | 23 | 0 | 188 mm | Ok | Penang in March |
| April | 31° / 27° | 11 | 19 | 0 | 260 mm | Ok | Penang in April |
| May | 31° / 27° | 12 | 19 | 0 | 265 mm | Ok | Penang in May |
| June | 31° / 26° | 7 | 23 | 0 | 167 mm | Ok | Penang in June |
| July | 31° / 26° | 9 | 22 | 0 | 200 mm | Ok | Penang in July |
| August | 31° / 26° | 12 | 19 | 0 | 271 mm | Ok | Penang in August |
| September | 30° / 26° | 12 | 18 | 0 | 273 mm | Ok | Penang in September |
| October | 30° / 26° | 14 | 17 | 0 | 286 mm | Ok | Penang in October |
| November | 30° / 26° | 16 | 14 | 0 | 318 mm | Ok | Penang in November |
| December | 30° / 25° | 12 | 19 | 0 | 216 mm | Ok | Penang in December |