Click on a day for an hourly weather forecast
The temperatures in Wanganui in September are quite cold with temperatures between 8°C and 13°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Wanganui. 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 Wanganui in September 2025.
If you’re planning to visit Wanganui in the near future, we highly recommend that you review the 14 day weather forecast for Wanganui before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 21° / 14° | 4 | 27 | 0 | 75 mm | Good | Wanganui in January |
| February | 21° / 14° | 4 | 24 | 0 | 86 mm | Good | Wanganui in February |
| March | 20° / 13° | 4 | 27 | 0 | 89 mm | Good | Wanganui in March |
| April | 17° / 12° | 6 | 24 | 0 | 131 mm | Good | Wanganui in April |
| May | 15° / 10° | 6 | 25 | 0 | 121 mm | Good | Wanganui in May |
| June | 13° / 9° | 8 | 22 | 0 | 136 mm | Bad | Wanganui in June |
| July | 12° / 7° | 8 | 23 | 0 | 130 mm | Bad | Wanganui in July |
| August | 12° / 7° | 8 | 23 | 0 | 140 mm | Bad | Wanganui in August |
| September | 13° / 8° | 9 | 21 | 0 | 151 mm | Bad | Wanganui in September |
| October | 15° / 9° | 9 | 22 | 0 | 130 mm | Ok | Wanganui in October |
| November | 17° / 11° | 6 | 24 | 0 | 116 mm | Good | Wanganui in November |
| December | 19° / 13° | 6 | 25 | 0 | 115 mm | Good | Wanganui in December |