Last updated: June 24, 2025
In December, the average temperature in Tonica, United States hovers around 1°C (34°F). Expect the mercury to dip as low as -21°C (-5°F) and occasionally rise to a pleasant 20°C (68°F). During this month, rainfall averages 53 mm (2.1 in) over about 6 days, contributing to a notable average humidity of 84%. Make sure to dress appropriately for the chilly and humid conditions!
In December in Tonica, the average temperature is 1°C (34°F). The maximum can reach 20°C (68°F) and the minimum can be as low as -21°C (-5°F). This variation in temperatures makes Tonica an intriguing destination for travelers, offering a mix of chilly days and surprisingly warm spells.
In Tonica in December, the precipitation amount is 53 mm (2.1 in) over a span of 6 days.
In Tonica in December humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.
In Tonica 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 Tonica, you can visit Hourly UV Index in Tonica.
UV Risk Categories
Weather in Tonica varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Tonica, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 60 mm (2.3 inches) | 82% | moderate |
| February Weather | -2°C (28°F) | 65 mm (2.5 inches) | 83% | moderate |
| March Weather | 5°C (41°F) | 93 mm (3.7 inches) | 84% | high |
| April Weather | 10°C (50°F) | 115 mm (4.5 inches) | 85% | very high |
| May Weather | 17°C (63°F) | 160 mm (6.3 inches) | 79% | very high |
| June Weather | 23°C (73°F) | 147 mm (5.8 inches) | 82% | extreme |
| July Weather | 24°C (76°F) | 104 mm (4.1 inches) | 80% | very high |
| August Weather | 23°C (74°F) | 78 mm (3.1 inches) | 81% | very high |
| September Weather | 20°C (69°F) | 85 mm (3.3 inches) | 80% | very high |
| October Weather | 13°C (55°F) | 132 mm (5.2 inches) | 82% | high |
| November Weather | 4°C (40°F) | 56 mm (2.2 inches) | 88% | moderate |
| December Weather | 1°C (34°F) | 53 mm (2.1 inches) | 84% | low |