Last updated: June 24, 2025
In December, the average temperature in Wellington, United States hovers around 5°C (40°F). Expect chilly days, with minimum temperatures plummeting to -13°C (9°F) and the occasional warm spell reaching up to 25°C (77°F). The month brings a modest precipitation of 30 mm (1.2 in) spread over 3 days, and the air remains quite humid, with an average humidity level of 85%. Prepare for a blend of coolness and moisture in this captivating locale!
In December in Wellington, the average temperature is 5°C (40°F). Maximums can reach 25°C (77°F) and minimums can be as low as -13°C (9°F). It's advisable to pack layers to prepare for varying temperatures during your travels.
In Wellington in December, the precipitation amount is 30 mm (1.2 in) over the course of 3 days.
In Wellington in December, humidity is 85%. With an average temperature of 5°C (40°F), this humidity feels like wandering through a damp, cold fog that clings to your skin, making every step feel heavy and the air thick as you explore the sights.
In Wellington in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Wellington, you can check the information here.
UV Risk Categories
Weather in Wellington varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Wellington, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 43 mm (1.7 inches) | 77% | moderate |
| February Weather | 2°C (36°F) | 32 mm (1.3 inches) | 76% | high |
| March Weather | 10°C (50°F) | 84 mm (3.3 inches) | 71% | high |
| April Weather | 14°C (57°F) | 91 mm (3.6 inches) | 73% | very high |
| May Weather | 20°C (68°F) | 170 mm (6.7 inches) | 83% | very high |
| June Weather | 26°C (79°F) | 108 mm (4.3 inches) | 83% | extreme |
| July Weather | 27°C (82°F) | 58 mm (2.3 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 96 mm (3.8 inches) | 73% | very high |
| September Weather | 23°C (75°F) | 77 mm (3.1 inches) | 67% | very high |
| October Weather | 15°C (59°F) | 136 mm (5.4 inches) | 72% | high |
| November Weather | 8°C (47°F) | 25 mm (1.0 inches) | 82% | moderate |
| December Weather | 5°C (40°F) | 30 mm (1.2 inches) | 85% | moderate |