Stewart Island in september: average Weather, Temperature and Climate
Weather in Stewart Island in september 2025
The weather in Stewart Island in the month of september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
bad weather 20.5cm
Weather at 6am
43°F
Partly Cloudy
25% of time
23%
20%
16%
Weather at 12pm
52°F
Moderate rain at times
31% of time
23%
22%
14%
Weather at 6pm
50°F
Moderate rain at times
33% of time
26%
22%
10%
Weather at 3am
45°F
24%
24%
23%
14%
Evolution of daily average temperature and precipitation in Stewart Island in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Stewart Island in september.
The climate of Stewart Island in september is bad
The weather in september in Stewart Island is wet (with 5.9in of rainfall over 11 days). The weather's not getting better compared to the previous month since in august there is an average of 4.2in of precipitation over 7 days.
The climate is quite cold in this location september, but it is liveable by dressing hot. The thermometer averaged maximum of 54°F. On average, the recorded minimum temperature is 43°F. Thus, the mean temperature average on this month of september in Stewart Island is 49°F. These temperatures are far removed from those records observed in Stewart Island in september with a maximum record of 68°F in 2017 and a minimum record of 31°F in 2013.
In september in Stewart Island, the days on average last 11:44. The sun rises at 07:53 and sets at 19:37.
With a bad climate, this month is not recommended to go in this city in New Zealand.
September: another location in New Zealand?
If you want to go to New Zealand in september, there are destinations with better weather than Stewart Island:
In september, Cape Reinga, Omamari, Dargaville, Kaitaia, Kerikeri and Ruakaka have good weather.
Finally, Auckland, Christchurch, Rotorua, Wellington, Tauranga and Abel Tasman National Park have a tolerable climate, but better than Stewart Island.
Seasonal average climate and temperature of Stewart Island in september
Check below seasonal norms These statistics are set from the weather statements earlier years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 49°F | ||||
| Highest temperature | 54°F | ||||
| Lowest temperature | 43°F | ||||
| Highest record temperature | 68°F (2017) | ||||
| Lowest record temperature | 31°F (2013) | ||||
| Number of days at +65°F | 1 day(s) (3%) | ||||
| Number of days at -32°F | 0 day(s) (0%) | ||||
| Sea temperature | |||||
| Average sea temperature | 52°F | ||||
| Lowest sea temperature | 51°F | ||||
| Highest sea temperature | 54°F | ||||
| Wind | |||||
| Wind speed | 23km/h | ||||
| Wind temperature | 38°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 5.9in | ||||
| Number of days with rainfall | 11 day(s) (35%) | ||||
| Record daily rainfall | 1.5in (2021) | ||||
| Snowfall | 20.5cm | ||||
| Other climate data | |||||
| Humidity | 88% | ||||
| Visibility | 9.03km | ||||
| Cloud cover | 50% | ||||
| UV index | 3 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 07:53 | ||||
| Time of sunset | 19:37 | ||||
| Length of day | 11:44 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | bad | ||||
How was the weather last september?
Here is the day by day recorded weather in Stewart Island in september 2024:
45°F to 56°F
52°F to 61°F
47°F to 54°F
43°F to 52°F
45°F to 59°F
50°F to 58°F
50°F to 59°F
45°F to 52°F
43°F to 54°F
45°F to 47°F
40°F to 54°F
43°F to 50°F
36°F to 47°F
36°F to 52°F
43°F to 45°F
36°F to 49°F
38°F to 45°F
40°F to 50°F
43°F to 49°F
36°F to 56°F
38°F to 58°F
41°F to 54°F
45°F to 56°F
43°F to 50°F
38°F to 56°F
43°F to 49°F
41°F to 49°F
43°F to 54°F
50°F to 56°F
40°F to 58°F
Map: other cities in New Zealand in september
Cities near Stewart Island:
| Invercargill in september | bad weather |
| The Catlins in september | bad weather |
| Gore in september | bad weather |
| Balclutha in september | very bad weather |
| Te Anau in september | very bad weather |
| Queenstown in september | very bad weather |
| Dunedin in september | bad weather |
| Otago Peninsula in september | bad weather |
| Milford Sound in september | very bad weather |
| Roys Peak in september | very bad weather |
| Wanaka in september | very bad weather |
| Saint Bathans in september | very bad weather |
Click over cities on the map for information about the weather in september.
Stewart Island
perfect weather
good
tolerable
bad
very bad
Weather data for Stewart Island in september:
Weather data for Stewart Island for september are derived from an average of the weather forecast since 2009 in Stewart Island. There is a margin of error and these forecasts are to be considered as general information only. The weather in Stewart Island can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Stewart Island.