Invercargill Weather in September

Invercargill in September sees moderate daytime temperatures of 13°C (55°F) and nighttime lows of 6°C (43°F). Rainfall is fairly high this month at around 102 mm (4 in), so pack a rain jacket to stay dry.

Rainfall in Invercargill in September

The climate data from previous years indicates about 18 days of rain, averaging 102 mm (4 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.

Temperature in Invercargill in September

In September, Invercargill gets moderate temperatures, with highs of 13°C (55°F). Nights cool to around 6°C (43°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to 6°C (43°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Invercargill in September

The month brings about 142 hours of sunlight, offering a comfortable mix of sun and overcast.

Wind Speed in Invercargill in September

In September, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

Average water temperature in September

The water temperature is only 10°C (50°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Invercargill. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit New Zealand, check out our Invercargill's climate page.

Invercargill Temperature in September

Min Temperature 6°C (43°F)  

Max Temperature 13°C (55°F)  

Water Temperature 10°C (50°F)  

Chance of Rain 59%  

Precipitation 102 mm (4 in)  

Rainy days 18 days  

Humidity 81%  

Windspeed 4 m/s (8 knots)  

Sunshine 142 hours  

Percentage Sunshine 41%  

Daily Historical Temperatures

48-year average (1976-2025)

Based on our historical records, temperatures in Invercargill typically stay consistent throughout September, with daily highs averaging around 13°C (55°F). Nights are cold, with lows around 5°C (41°F).

Average temperatures in September

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Historical weather for Invercargill in September

Browse day-by-day weather records for Invercargill spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Invercargill historical weather extremes in September

According to our 28 years of weather records for Invercargill, the following extremes were recorded between 1997 and 2025.

• On September 20, 2023, temperatures climbed to 22°C (72°F), marking the warmest September day on record.
• The coldest September day was on September 18, 2010, with a maximum of 4°C (39°F).
• Invercargill registered its coldest September night on September 5, 2008, with temperatures dropping to -3°C (27°F).
• The wettest day in September Invercargill was on September 21, 2023 with 63 mm (2.5 in) of precipitation.

What to Wear in Invercargill in September

Pack for changing conditions in Invercargill in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 10°C (50°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Invercargill in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit New Zealand, check out our Invercargill's climate page.

More climate data for Invercargill

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Invercargill climate overview or explore weather in New Zealand.