Kermadec Weather in September

September in Kermadec sees daytime temperatures around 19°C (66°F) and lows of 17°C (63°F) at night. With around 88 mm (3.5 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Kermadec in September

This month experiences about 14 days of rain according to historical data, averaging 88 mm (3.5 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Kermadec in September

September in Kermadec brings typical temperatures with highs around 19°C (66°F) and lows of 17°C (63°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 17°C (63°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Kermadec in September

With about 161 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Average water temperature in September

With water at 17°C (63°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

If you prefer dry days with pleasant temperatures, January, October, November and December typically offer the best 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
• March
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• May
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• October
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For a detailed overview over the year and the best time to visit Kermadec Islands, check out our Kermadec's climate page.

Kermadec Temperature in September

Min Temperature 17°C (63°F)  

Max Temperature 19°C (66°F)  

Water Temperature 17°C (63°F)  

Chance of Rain 46%  

Precipitation 88 mm (3.5 in)  

Rainy days 14 days  

Humidity 80%  

Sunshine 161 hours  

Percentage Sunshine 47%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Kermadec typically stay consistent throughout September, with daily highs averaging around 19°C (66°F). Nights are pleasant, with lows around 15°C (59°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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Historical weather for Kermadec in September

Browse day-by-day weather records for Kermadec 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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Kermadec historical weather extremes in September

According to our 49 years of weather records for Kermadec, the following extremes were recorded between 1976 and 2025.

• The hottest September day on record in Kermadec reached 24°C (75°F) (September 4, 2024).
• Kermadec experienced its chilliest September day on September 4, 1992, reaching only 15°C (59°F).
• Kermadec registered its coldest September night on September 7, 1992, with temperatures dropping to 7°C (45°F).

What to Wear in Kermadec in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 17°C (63°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Kermadec in September

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

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

8/10

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 Kermadec Islands, check out our Kermadec's climate page.

More climate data for Kermadec

Temperature Rainfall Sunshine Humidity Water Temp

See the full Kermadec climate overview or explore weather in Kermadec Islands.