Click on a day for an hourly weather forecast
The temperatures in Napier in September are quite cold with temperatures between 9°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Napier 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 Napier in September 2025.
If you’re planning to visit Napier in the near future, we highly recommend that you review the 14 day weather forecast for Napier before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 22° / 15° | 4 | 27 | 0 | 72 mm | Good | Napier in January |
| February | 21° / 16° | 4 | 25 | 0 | 85 mm | Good | Napier in February |
| March | 20° / 14° | 4 | 27 | 0 | 96 mm | Good | Napier in March |
| April | 18° / 13° | 4 | 26 | 0 | 109 mm | Good | Napier in April |
| May | 15° / 11° | 4 | 27 | 0 | 70 mm | Good | Napier in May |
| June | 13° / 9° | 6 | 24 | 0 | 124 mm | Ok | Napier in June |
| July | 12° / 8° | 6 | 25 | 0 | 112 mm | Ok | Napier in July |
| August | 13° / 9° | 5 | 26 | 0 | 101 mm | Ok | Napier in August |
| September | 14° / 9° | 7 | 23 | 0 | 123 mm | Ok | Napier in September |
| October | 16° / 10° | 5 | 26 | 0 | 78 mm | Good | Napier in October |
| November | 18° / 12° | 4 | 26 | 0 | 72 mm | Good | Napier in November |
| December | 20° / 14° | 4 | 27 | 0 | 56 mm | Good | Napier in December |