Wellington Weather in September

With daytime temperatures of 14°C (57°F) and nighttime lows of 10°C (50°F), September in Wellington brings moderate temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 80 mm (3.1 in) falls on average.

Rainfall in Wellington in September

Climate statistics over the past 30 years suggest around 15 days of rain, with 80 mm (3.1 in) average for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Wellington in September

Wellington in September gets highs of 14°C (57°F) during the day and drops to 10°C (50°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 10°C (50°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Wellington in September

The month experiences a moderate amount of sunlight, with 170 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Wellington in September

September has wind speeds averaging 7 m/s (14 knots). You can expect generally windy conditions with strong breezes affecting daily routines on typical days. As an average, some days have moderate strong winds while others feature more intense gusts that make walking and movement challenging.

Average water temperature in September

At 12°C (54°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

Should you favor a climate that's both dry and comfortably warm, January, February and March typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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• January
• February
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• May
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For a detailed overview over the year and the best time to visit New Zealand, check out our Wellington's climate page.

Wellington Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 14°C (57°F)  

Water Temperature 12°C (54°F)  

Chance of Rain 51%  

Precipitation 80 mm (3.1 in)  

Rainy days 15 days  

Humidity 81%  

Windspeed 7 m/s (14 knots)  

Sunshine 170 hours  

Percentage Sunshine  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Wellington typically stay consistent throughout September, with daily highs averaging around 14°C (57°F). Nights are cool, with lows around 9°C (48°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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

Historical weather for Wellington in September

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

Historical weather Temperatures Precipitation

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

Wellington historical weather extremes in September

The extremes listed below come from historical weather data collected in Wellington from 1976 through 2025.

• The warmest day in September was on September 24, 1996, with a maximum of 22°C (72°F).
• On September 6, 1977, Wellington saw its coldest September day with temperatures maxing out at 6°C (43°F).
• The coldest night in September in Wellington was on September 7, 1997, with a minimum of 0°C (32°F).

What to Wear in Wellington in September

Pack for changing conditions in Wellington 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. The water temperature sits at about 12°C (54°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Wellington 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

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 Wellington's climate page.

More climate data for Wellington

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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