Last updated: June 24, 2025
In December, the average temperature in Niantic, United States hovers around 2°C (37°F). Expect a chilly bite, with minimum temperatures plunging to -19°C (-3°F), while the mercury can rise to a pleasant 19°C (67°F). With 51 mm (2.0 in) of precipitation occurring over about 7 days, you'll want to be prepared for a mix of rain and snow. Don't forget that humidity is typically high, averaging 87%, adding to the crisp atmosphere!
In December in Niantic, the average temperature is 2°C (37°F). Maximum temperatures can reach 19°C (67°F), while minimums can drop as low as -19°C (-3°F). Be prepared for a wide range of temperatures if you're traveling during this month.
In Niantic in December, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.
In Niantic in December, humidity is 87%. With an average temperature of 2°C (37°F), this humidity feels like an uncomfortable chill that seeps into your bones, making every step feel heavier and each breath a reminder of the dampness in the air, which can be quite challenging for traveling.
In Niantic 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 Niantic, you can check the information here.
UV Risk Categories
Weather in Niantic varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Niantic, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (30°F) | 72 mm (2.8 inches) | 84% | moderate |
| February Weather | 0°C (32°F) | 74 mm (2.9 inches) | 82% | moderate |
| March Weather | 6°C (44°F) | 130 mm (5.1 inches) | 84% | high |
| April Weather | 11°C (53°F) | 130 mm (5.1 inches) | 83% | very high |
| May Weather | 19°C (66°F) | 145 mm (5.7 inches) | 80% | very high |
| June Weather | 24°C (75°F) | 111 mm (4.4 inches) | 83% | extreme |
| July Weather | 25°C (78°F) | 115 mm (4.5 inches) | 82% | extreme |
| August Weather | 23°C (74°F) | 91 mm (3.6 inches) | 82% | very high |
| September Weather | 22°C (71°F) | 61 mm (2.4 inches) | 79% | very high |
| October Weather | 14°C (58°F) | 109 mm (4.3 inches) | 79% | high |
| November Weather | 5°C (42°F) | 72 mm (2.8 inches) | 88% | moderate |
| December Weather | 2°C (37°F) | 51 mm (2.0 inches) | 87% | moderate |