Click on a day for an hourly weather forecast
The temperatures in Invercargill in September are quite cold with temperatures between 5°C and 12°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Invercargill. 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.
Please note that Invercargill can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Invercargill in September 2025.
If you’re planning to visit Invercargill in the near future, we highly recommend that you review the 14 day weather forecast for Invercargill before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 17° / 10° | 10 | 21 | 0 | 167 mm | Ok | Invercargill in January |
| February | 17° / 10° | 7 | 21 | 0 | 131 mm | Ok | Invercargill in February |
| March | 16° / 10° | 8 | 23 | 0 | 126 mm | Ok | Invercargill in March |
| April | 14° / 8° | 8 | 22 | 0 | 137 mm | Ok | Invercargill in April |
| May | 12° / 7° | 11 | 20 | 0 | 150 mm | Bad | Invercargill in May |
| June | 10° / 6° | 8 | 22 | 0 | 112 mm | Bad | Invercargill in June |
| July | 9° / 5° | 9 | 22 | 0 | 125 mm | Bad | Invercargill in July |
| August | 11° / 5° | 8 | 23 | 1 | 105 mm | Bad | Invercargill in August |
| September | 12° / 5° | 9 | 20 | 1 | 149 mm | Bad | Invercargill in September |
| October | 13° / 6° | 10 | 21 | 0 | 167 mm | Bad | Invercargill in October |
| November | 15° / 8° | 10 | 20 | 0 | 162 mm | Ok | Invercargill in November |
| December | 17° / 9° | 8 | 23 | 0 | 133 mm | Ok | Invercargill in December |