New Plymouth Weather in September
What's the weather like in New Plymouth (Taranaki) in September 2025?
The climate in New Plymouth during September can be summarized as mild and wet.
September is in the spring in New Plymouth and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 14°C (58°F), whilst at night 7°C (45°F) is normal.
| Daytime temperature | 14.4°C 57.9°F |
|---|---|
| Nightly temperature | 7.2°C 45°F |
| Average temperature | 10.8°C 51.4°F |
| Daily sunshine | 5.3 hrs |
| Avg rainfall | 143 mm 5.6 ins |
| Rainy days | 16 days |
| Sea temperature | 13.5°C 56.2°F |
| Humidity | 79% |
| Windspeed | 17.3kph 11 mph |
On average September is the 6th wettest month of the year in New Plymouth with around 143mm 5.6 inches of rain making it a wet time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.3 hours of sunshine per day.
September temperatures in New Plymouth
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in New Plymouth in September 2025.
Other monthly averages
Best places to visit in September
New Plymouth weather stats
| Hottest month: | February | 21.5°C 70.7°F |
|---|---|---|
| Driest month: | February | 108mm 4.3ins |
| Sunniest month: | February | 8.2hrs |
| Coldest month: | July | 12.5°C 54.5°F |
| Wettest month: | July | 181mm 7.1ins |
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