Click on a day for an hourly weather forecast
The temperatures in Masterton in September are quite cold with temperatures between 9°C and 13°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Masterton. 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 Masterton in September 2025.
If you’re planning to visit Masterton in the near future, we highly recommend that you review the 14 day weather forecast for Masterton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 15° | 5 | 26 | 0 | 84 mm | Good | Masterton in January |
| February | 20° / 15° | 4 | 24 | 0 | 105 mm | Good | Masterton in February |
| March | 19° / 14° | 5 | 26 | 0 | 82 mm | Good | Masterton in March |
| April | 16° / 13° | 6 | 24 | 0 | 120 mm | Good | Masterton in April |
| May | 14° / 11° | 7 | 24 | 0 | 131 mm | Ok | Masterton in May |
| June | 12° / 9° | 8 | 22 | 0 | 149 mm | Bad | Masterton in June |
| July | 12° / 8° | 8 | 23 | 0 | 132 mm | Bad | Masterton in July |
| August | 12° / 8° | 9 | 22 | 0 | 135 mm | Bad | Masterton in August |
| September | 13° / 9° | 8 | 22 | 0 | 129 mm | Bad | Masterton in September |
| October | 14° / 10° | 7 | 24 | 0 | 123 mm | Ok | Masterton in October |
| November | 16° / 11° | 6 | 24 | 0 | 114 mm | Good | Masterton in November |
| December | 18° / 13° | 7 | 24 | 0 | 131 mm | Ok | Masterton in December |