Last updated: June 24, 2025
In Lake Monticello, United States, the average temperature in December hovers around 5°C (42°F). Expect a chill, as temperatures can dip as low as -11°C (13°F), while a rare warm spell might see highs of 22°C (72°F). During this month, precipitation totals about 89 mm (3.5 in) over 8 days, contributing to an average humidity level of 85%. Be prepared for a mix of cool weather and moisture!
In December in Lake Monticello, the average temperature is 5°C (42°F). Maximums can reach 22°C (72°F) and minimums can be as low as -11°C (13°F). Make sure to pack for a wide range of temperatures if you're traveling during this time.
In Lake Monticello in December, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.
In Lake Monticello in December, humidity is 85%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.
In Lake Monticello 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 Lake Monticello, you can check the information here.
UV Risk Categories
Weather in Lake Monticello varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Lake Monticello, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 64 mm (2.5 inches) | 84% | moderate |
| February Weather | 6°C (43°F) | 95 mm (3.8 inches) | 84% | high |
| March Weather | 9°C (49°F) | 67 mm (2.7 inches) | 84% | high |
| April Weather | 15°C (59°F) | 111 mm (4.4 inches) | 82% | very high |
| May Weather | 20°C (68°F) | 108 mm (4.3 inches) | 82% | very high |
| June Weather | 24°C (75°F) | 99 mm (3.9 inches) | 83% | very high |
| July Weather | 27°C (81°F) | 61 mm (2.4 inches) | 79% | very high |
| August Weather | 25°C (78°F) | 123 mm (4.8 inches) | 77% | very high |
| September Weather | 22°C (72°F) | 92 mm (3.6 inches) | 75% | very high |
| October Weather | 17°C (63°F) | 110 mm (4.3 inches) | 81% | high |
| November Weather | 9°C (48°F) | 75 mm (3.0 inches) | 87% | moderate |
| December Weather | 5°C (42°F) | 89 mm (3.5 inches) | 85% | moderate |