Click on a day for an hourly weather forecast
The temperatures in Greymouth in September are quite cold with temperatures between 6°C and 12°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Greymouth 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 Greymouth in September 2025.
If you’re planning to visit Greymouth in the near future, we highly recommend that you review the 14 day weather forecast for Greymouth before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 18° / 12° | 6 | 25 | 0 | 117 mm | Good | Greymouth in January |
| February | 19° / 12° | 4 | 24 | 0 | 92 mm | Good | Greymouth in February |
| March | 18° / 11° | 5 | 26 | 0 | 88 mm | Good | Greymouth in March |
| April | 15° / 10° | 6 | 25 | 0 | 111 mm | Good | Greymouth in April |
| May | 13° / 8° | 7 | 24 | 0 | 135 mm | Bad | Greymouth in May |
| June | 11° / 6° | 5 | 25 | 0 | 113 mm | Ok | Greymouth in June |
| July | 10° / 5° | 7 | 24 | 0 | 129 mm | Bad | Greymouth in July |
| August | 11° / 6° | 7 | 24 | 0 | 132 mm | Bad | Greymouth in August |
| September | 12° / 6° | 7 | 23 | 0 | 126 mm | Bad | Greymouth in September |
| October | 13° / 7° | 9 | 22 | 0 | 142 mm | Bad | Greymouth in October |
| November | 15° / 9° | 6 | 24 | 0 | 117 mm | Good | Greymouth in November |
| December | 17° / 11° | 7 | 24 | 0 | 136 mm | Ok | Greymouth in December |