Last updated: June 24, 2025
In Platteville, United States, the average temperature in December hovers around -2°C (30°F), with minimums plummeting to -22°C (-8°F) and highs reaching up to 19°C (67°F). Expect about 43 mm (1.7 in) of precipitation spread over 6 days, while the air carries an average humidity of 82%.
In December in Platteville, the average temperature is -2°C (30°F), with a maximum that can reach 19°C (67°F) and a minimum that can drop as low as -22°C (-8°F). Be prepared for a wide range of temperatures when traveling to Platteville during this time.
In Platteville in December, the precipitation amount is 43 mm (1.7 in) over a period of 6 days.
In Platteville in December humidity is 82%. With an average temperature of -2°C (30°F), this humidity feels like a chilling dampness clinging to your skin, making outdoor travel feel much colder than it actually is, while also making layers of clothing feel heavy and wet.
In Platteville 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 Platteville, you can visit Hourly UV Index in Platteville.
UV Risk Categories
Weather in Platteville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Platteville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 48 mm (1.9 inches) | 84% | moderate |
| February Weather | -5°C (23°F) | 60 mm (2.4 inches) | 85% | moderate |
| March Weather | 3°C (37°F) | 63 mm (2.5 inches) | 84% | high |
| April Weather | 8°C (47°F) | 89 mm (3.5 inches) | 83% | very high |
| May Weather | 16°C (60°F) | 144 mm (5.7 inches) | 75% | very high |
| June Weather | 22°C (71°F) | 133 mm (5.3 inches) | 79% | very high |
| July Weather | 24°C (75°F) | 99 mm (3.9 inches) | 75% | very high |
| August Weather | 22°C (71°F) | 98 mm (3.9 inches) | 69% | very high |
| September Weather | 19°C (66°F) | 117 mm (4.6 inches) | 74% | very high |
| October Weather | 11°C (51°F) | 124 mm (4.9 inches) | 79% | moderate |
| November Weather | 2°C (37°F) | 45 mm (1.8 inches) | 88% | moderate |
| December Weather | -2°C (30°F) | 43 mm (1.7 inches) | 82% | low |