New Plymouth Weather in December
What's the weather like in New Plymouth (Taranaki) in December 2025?
The climate in New Plymouth during December can be summarized as mild and wet.
December is in the summer in New Plymouth and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 12°C (53°F) is normal.
| Daytime temperature | 19.7°C 67.5°F |
|---|---|
| Nightly temperature | 11.5°C 52.7°F |
| Average temperature | 15.6°C 60.1°F |
| Daily sunshine | 7.9 hrs |
| Avg rainfall | 131 mm 5.1 ins |
| Rainy days | 13 days |
| Sea temperature | 16.7°C 62.1°F |
| Humidity | 79% |
| Windspeed | 16.6kph 10 mph |
On average December is the 4th driest month of the year in New Plymouth with around 131mm 5.1 inches of rain making it a wet time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.9 hours of sunshine per day.
December temperatures in New Plymouth
December rainfall
December 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 December 2025.
Other monthly averages
Best places to visit in December
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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