Last updated: June 24, 2025
In December, the average temperature in Oconomowoc Lake, United States hovers around -1°C (30°F). Expect chilly conditions, with minimums dipping as low as -22°C (-8°F) and occasional highs reaching 19°C (66°F). During this month, precipitation averages 46 mm (1.8 in) across about 7 days, contributing to an overall humidity level of 81%. Stay warm and prepared for a wet, brisk climate!
In December in Oconomowoc Lake, the average temperature is -1°C (30°F), with a maximum that can reach 19°C (66°F) and a minimum that can drop as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures, so packing layers is essential for comfort.
In Oconomowoc Lake in December, the precipitation amount is 46 mm (1.8 in) over the course of 7 days.
In Oconomowoc Lake in December, humidity is 81%. With an average temperature of -1°C (30°F), this humidity feels like an extra layer of chill settles in, making travel uncomfortable and the cold air cling to your skin, dampening the experience with every breath.
In Oconomowoc Lake 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 Oconomowoc Lake, you can visit Hourly UV Index in Oconomowoc Lake.
UV Risk Categories
Weather in Oconomowoc Lake varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Oconomowoc Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 56 mm (2.2 inches) | 85% | moderate |
| February Weather | -5°C (24°F) | 51 mm (2.0 inches) | 85% | moderate |
| March Weather | 2°C (36°F) | 60 mm (2.4 inches) | 85% | moderate |
| April Weather | 8°C (46°F) | 108 mm (4.3 inches) | 85% | very high |
| May Weather | 15°C (59°F) | 129 mm (5.1 inches) | 78% | very high |
| June Weather | 21°C (70°F) | 111 mm (4.4 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 99 mm (3.9 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 86 mm (3.4 inches) | 76% | very high |
| September Weather | 18°C (66°F) | 97 mm (3.8 inches) | 79% | high |
| October Weather | 11°C (52°F) | 113 mm (4.5 inches) | 83% | moderate |
| November Weather | 3°C (37°F) | 46 mm (1.8 inches) | 88% | moderate |
| December Weather | -1°C (30°F) | 46 mm (1.8 inches) | 81% | low |