Weather in New Zealand for September 2025
Until now, September 2025 in New Zealand has been nearly identical to the historical average, with a temperature of 20.5 °C (showing only a slight deviation of 0.3 °C).
Expect cooler weather in the next days in New Zealand with the forecast suggesting a temperature of 16.3 °C, lower than the historical average.
In general, the average temperature in New Zealand at the beginning of September is 21.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.7 °C by the end of September.
New Zealand experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 80 mm.
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New Zealand Weather September
Temperatures trend during September in New Zealand
September weather in New Zealand day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 21° /14° | 0.2 mm | 5 | |
| 2 Sept. |  Moderate rain at times | 20° /13° | 12.3 mm | 5 | |
| 3 Sept. |  Overcast | 20° /12° | 0 mm | 5 | |
| 4 Sept. | Patchy rain possible | 21° /12° | 0.1 mm | 6 | |
| 5 Sept. |  Sunny | 23° /13° | 0 mm | 6 | |
| 6 Sept. | Overcast | 24° /16° | 0 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 20° /16° | 35.4 mm | 5 | |
| 8 Sept. | Moderate rain at times | 20° /14° | 11.7 mm | 5 | |
| 9 Sept. |  Partly cloudy | 19° /11° | 0 mm | 5 | |
| 10 Sept. |  Cloudy | 19° /12° | 0 mm | 5 | |
| 11 Sept. | Patchy rain possible | 19° /11° | 0.1 mm | 5 | |
| 12 Sept. | Sunny | 17° /10° | 0 mm | 5 | |
| 13 Sept. | Patchy rain possible | 20° /13° | 0.1 mm | 5 | |
| 14 Sept. | Overcast | 21° /13° | 0 mm | 1 | |
| 15 Sept. | Partly cloudy | 17° /13° | 0 mm | 1.1 | |
| 16 Sept. | Sunny | 18° /14° | 0 mm | 1.1 | |
| 17 Sept. | Sunny | 22° /14° | 0 mm | 1.2 | |
| 18 Sept. | Sunny | 23° /15° | 0 mm | 0.1 | |
| 19 Sept. |  Moderate rain | 17° /11° | 5.8 mm | 4 | |
| 20 Sept. | Patchy rain possible | 11° /11° | 0.2 mm | 3 | |
| 21 Sept. | Sunny | 17° /13° | 0 mm | 4 | |
| 22 Sept. | Patchy rain possible | 16° /13° | 0 mm | 3 | |
| 23 Sept. | Sunny | 15° /11° | 0 mm | 4 | |
| 24 Sept. | Sunny | 14° /10° | 0 mm | 4 | |
| 25 Sept. | Patchy rain possible | 14° /11° | 2.2 mm | 3 | |
| 26 Sept. | Moderate rain | 12° /10° | 7.9 mm | 3 | |
| 27 Sept. | Moderate rain | 11° /10° | 16.5 mm | 3 | |
| 28 Sept. | Patchy rain possible | 16° /12° | 0.4 mm | 4 | |
| 29 Sept. | Overcast | 15° /12° | 0 mm | 4 | |
| 30 Sept. |  Mist | 14° /12° | 0 mm | 3 | |
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New Zealand in September - FAQ
September rainfall patterns in New Zealand
UV exposure in New Zealand during September
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