Click on a day for an hourly weather forecast
The temperatures in Portarlington in September are quite cold with temperatures between 8°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Portarlington during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Portarlington in September 2025.
If you’re planning to visit Portarlington in the near future, we highly recommend that you review the 14 day weather forecast for Portarlington before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 25° / 15° | 3 | 28 | 0 | 65 mm | Perfect | Portarlington in January |
| February | 25° / 15° | 3 | 26 | 0 | 68 mm | Perfect | Portarlington in February |
| March | 23° / 14° | 3 | 28 | 0 | 56 mm | Perfect | Portarlington in March |
| April | 19° / 12° | 3 | 27 | 0 | 54 mm | Good | Portarlington in April |
| May | 16° / 10° | 3 | 28 | 0 | 61 mm | Good | Portarlington in May |
| June | 14° / 8° | 3 | 27 | 0 | 57 mm | Good | Portarlington in June |
| July | 13° / 7° | 4 | 28 | 0 | 53 mm | Ok | Portarlington in July |
| August | 14° / 7° | 4 | 27 | 0 | 60 mm | Good | Portarlington in August |
| September | 16° / 8° | 4 | 26 | 0 | 69 mm | Good | Portarlington in September |
| October | 19° / 9° | 5 | 26 | 0 | 79 mm | Good | Portarlington in October |
| November | 21° / 11° | 4 | 26 | 0 | 72 mm | Good | Portarlington in November |
| December | 23° / 12° | 4 | 27 | 0 | 64 mm | Perfect | Portarlington in December |