Weather in New Zealand for September 2025
In general, the average temperature in New Zealand at the beginning of September is 16 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 15.4 °C by the end of September.
Expect significant rainfall in New Zealand during September, with an average of 17 rainy days.
Is September a good time to visit New Zealand? check out the best time to travel to New Zealand page.
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New Zealand in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  17° | 2 17° | 3  17° | 4  14° | 5  14° | 6  16° | 7 17° |
| 8  15° | 9 15° | 10 16° | 11 15° | 12  16° | 13 16° | 14 17° |
| 15 15° | 16 16° | 17 15° | 18 15° | 19  17° | 20 18° | 21 18° |
| 22 18° | 23 17° | 24 16° | 25 16° | 26 16° | 27 15° | 28 14° |
| 29 16° | 30 15° |
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Temperatures trend during September in New Zealand
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 17° /10° | 4.1 mm | 5 | |
| 2 Sept. | Overcast | 17° /10° | 0 mm | 5 | |
| 3 Sept. | Light drizzle | 17° /11° | 7.3 mm | 4 | |
| 4 Sept. | Moderate or heavy rain with thunder | 14° /10° | 16.6 mm | 4 | |
| 5 Sept. | Light rain shower | 14° /10° | 6.8 mm | 4 | |
| 6 Sept. | Moderate or heavy rain shower | 16° /11° | 6 mm | 5 | |
| 7 Sept. | Light rain shower | 17° /10° | 4.6 mm | 5 | |
| 8 Sept. | Mist | 15° /8° | 0.3 mm | 5 | |
| 9 Sept. | Mist | 15° /9° | 0 mm | 5 | |
| 10 Sept. | Patchy rain possible | 16° /11° | 0.4 mm | 5 | |
| 11 Sept. | Moderate or heavy rain shower | 15° /9° | 7.9 mm | 4 | |
| 12 Sept. | Cloudy | 16° /8° | 0 mm | 5 | |
| 13 Sept. | Cloudy | 16° /7° | 0.1 mm | 5 | |
| 14 Sept. | Cloudy | 17° /10° | 8.3 mm | 5 | |
| 15 Sept. | Overcast | 15° /10° | 3.4 mm | 4 | |
| 16 Sept. | Overcast | 16° /7° | 3 mm | 5 | |
| 17 Sept. | Mist | 15° /8° | 2.5 mm | 4 | |
| 18 Sept. | Patchy rain possible | 15° /9° | 1.1 mm | 4 | |
| 19 Sept. | Sunny | 17° /9° | 0.8 mm | 5 | |
| 20 Sept. | Mist | 18° /11° | 2.8 mm | 5 | |
| 21 Sept. | Sunny | 18° /10° | 0.1 mm | 5 | |
| 22 Sept. | Patchy rain possible | 18° /10° | 0.5 mm | 5 | |
| 23 Sept. | Light rain shower | 17° /12° | 12 mm | 5 | |
| 24 Sept. | Overcast | 16° /10° | 0.7 mm | 4 | |
| 25 Sept. | Patchy light drizzle | 16° /9° | 8.4 mm | 5 | |
| 26 Sept. | Light rain shower | 16° /9° | 3.3 mm | 4 | |
| 27 Sept. | Patchy rain possible | 15° /10° | 2.7 mm | 5 | |
| 28 Sept. | Light rain shower | 14° /10° | 2.9 mm | 5 | |
| 29 Sept. | Light rain shower | 16° /10° | 0.5 mm | 5 | |
| 30 Sept. | Light rain shower | 15° /9° | 5.2 mm | 4 | |
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Guide for New Zealand in September
In September, New Zealand experiences a transition from winter to spring, resulting in varied weather patterns across the country.
At the beginning of the month, the North Island typically enjoys mild temperatures with occasional showers, while the South Island may still experience cooler conditions with some snowfall in the alpine regions.
In the North Island, cities like Auckland and Wellington can expect temperatures around 15° at the start of the month, with increasing daylight hours and occasional gusty winds.
Meanwhile, the South Island's Christchurch and Queenstown may see temperatures around 10° with the possibility of frosty mornings and sunny afternoons.
As the month progresses, the weather in New Zealand generally becomes milder and more stable.
By the end of September, the North Island experiences pleasant spring weather with temperatures rising to around 18°, while the South Island sees a gradual increase in temperatures, reaching around 14° in Christchurch and Queenstown.
Rainfall becomes less frequent, and outdoor activities become more popular as the days become longer and the landscapes bloom with colorful blossoms and new foliage.
Overall, September marks the beginning of the delightful spring season in New Zealand, offering a mix of transitional weather and natural beauty.
New Zealand in September - FAQ
What to pack to New Zealand in September?
As you prepare for your trip to New Zealand in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in New Zealand, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in New Zealand
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