Last updated: June 24, 2025
In December, the average temperature in New Plymouth, United States hovers around 1°C (34°F). This chilly month can see temperatures dip as low as -11°C (13°F), while reaching a comfortable maximum of 15°C (59°F). With 37 mm (1.5 in) of precipitation spread over 9 days, be prepared for some wet weather. Don’t forget, the average humidity is a brisk 87%, adding to the overall coolness of the season!
In December in New Plymouth, the average temperature is 1°C (34°F), with maximums reaching 15°C (59°F) and minimums dropping to as low as -11°C (13°F). Be prepared for chilly weather and pack accordingly if you plan to travel during this time.
In New Plymouth in December, the precipitation amount is 37 mm (1.5 in) over a span of 9 days.
In New Plymouth in December humidity is 87%. With an average temperature of 1°C (34°F), this humidity feels like a chilling blanket enveloping you, making every step outside feel heavy and damp, and leaving you longing for warmth and comfort while traveling.
In New Plymouth in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in New Plymouth, you can visit Hourly UV Index in New Plymouth.
UV Risk Categories
Weather in New Plymouth varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in New Plymouth, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 48 mm (1.9 inches) | 88% | moderate |
| February Weather | 2°C (36°F) | 55 mm (2.2 inches) | 89% | moderate |
| March Weather | 8°C (46°F) | 41 mm (1.6 inches) | 85% | high |
| April Weather | 11°C (53°F) | 31 mm (1.2 inches) | 79% | high |
| May Weather | 17°C (62°F) | 34 mm (1.3 inches) | 71% | very high |
| June Weather | 22°C (72°F) | 19 mm (0.8 inches) | 71% | extreme |
| July Weather | 28°C (83°F) | 1 mm (0.0 inches) | 66% | very high |
| August Weather | 27°C (80°F) | 8 mm (0.3 inches) | 50% | very high |
| September Weather | 20°C (69°F) | 12 mm (0.5 inches) | 48% | very high |
| October Weather | 12°C (53°F) | 20 mm (0.8 inches) | 65% | moderate |
| November Weather | 6°C (42°F) | 35 mm (1.4 inches) | 84% | moderate |
| December Weather | 1°C (34°F) | 37 mm (1.5 inches) | 87% | low |