Dunedin Weather in September

Dunedin in September sees moderate daytime temperatures of 13°C (55°F) and nighttime lows of 4°C (39°F). Rainfall is fairly high this month at around 67 mm (2.6 in), so pack a rain jacket to stay dry.

Rainfall in Dunedin in September

Looking at the last 30 years, the data shows about 13 days with rain, averaging 67 mm (2.6 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Dunedin in September

If you're visiting Dunedin in September, expect highs of 13°C (55°F) and overnight lows around 4°C (39°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Dunedin in September

The month experiences a moderate amount of sunlight, with 134 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Dunedin in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in September

With water temperatures around 9°C (48°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. February and March typically offer the best weather for Dunedin.

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

Dunedin Temperature in September

Min Temperature 4°C (39°F)  

Max Temperature 13°C (55°F)  

Water Temperature 9°C (48°F)  

Chance of Rain 44%  

Precipitation 67 mm (2.6 in)  

Rainy days 13 days  

Humidity 72%  

Windspeed 3 m/s (6 knots)  

Sunshine 134 hours  

Percentage Sunshine 40%  

Daily Historical Temperatures

49-year average (1976-2025)

Based on our historical records, temperatures in Dunedin 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 Dunedin in September

Browse day-by-day weather records for Dunedin 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 ›

Dunedin historical weather extremes in September

Our historical data for Dunedin spans 2003 to 2025, revealing these weather extremes.

• Dunedin recorded its highest September temperature of 24°C (75°F) on September 29, 2012.
• The coldest September day was on September 29, 2020, with a maximum of 4°C (39°F).
• Nighttime temperatures dropped to -4°C (25°F) on September 2, 2020, marking the coldest September night on record.
• The wettest day in September Dunedin was on September 22, 2023 with 26 mm (1 in) of precipitation.

What to Wear in Dunedin in September

The weather can swing between comfortable and chilly in September, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Wet weather is likely, so pack waterproof gear for multiple rainy days. With water temperatures around 9°C (48°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Dunedin in September

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

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

10/10

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 Dunedin's climate page.

More climate data for Dunedin

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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