Last updated: June 24, 2025
In Newton, United States, the average temperature in December hovers around -1°C (31°F). Be prepared for chilly conditions, as the minimum temperature can plummet to -23°C (-8°F), while the mercury can rise to a maximum of 23°C (73°F). Expect about 37 mm (1.4 in) of precipitation over 5 days, creating a rather humid atmosphere with an average humidity of 83%.
In December in Newton, the average temperature is -1°C (31°F), with maximums reaching 23°C (73°F) and minimums plummeting as low as -23°C (-8°F). Travelers should be prepared for a wide range of temperatures, from chilly conditions requiring warm clothing to occasional mild days suitable for outdoor activities.
In Newton in December, the precipitation amount is 37 mm (1.4 in) spread over a duration of 5 days.
In Newton in December humidity is 83%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, icy blanket enveloping you, making each step outside feel like a struggle against the cold, damp air that clings to your skin, often leaving you wishing for warmth and refuge indoors.
In Newton 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 Newton, you can check the information here.
UV Risk Categories
Weather in Newton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Newton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 41 mm (1.6 inches) | 78% | moderate |
| February Weather | -5°C (23°F) | 46 mm (1.8 inches) | 80% | moderate |
| March Weather | 4°C (39°F) | 80 mm (3.1 inches) | 77% | high |
| April Weather | 9°C (49°F) | 79 mm (3.1 inches) | 77% | very high |
| May Weather | 17°C (62°F) | 165 mm (6.5 inches) | 77% | very high |
| June Weather | 23°C (74°F) | 126 mm (5.0 inches) | 81% | extreme |
| July Weather | 24°C (76°F) | 80 mm (3.1 inches) | 81% | very high |
| August Weather | 23°C (73°F) | 75 mm (2.9 inches) | 77% | very high |
| September Weather | 20°C (68°F) | 119 mm (4.7 inches) | 73% | very high |
| October Weather | 11°C (53°F) | 144 mm (5.7 inches) | 75% | high |
| November Weather | 3°C (38°F) | 45 mm (1.8 inches) | 85% | moderate |
| December Weather | -1°C (31°F) | 37 mm (1.4 inches) | 83% | moderate |