Last updated: June 24, 2025
In December, the average temperature in Clear Lake, United States hovers around -5°C (24°F), creating a chilly atmosphere perfect for bundling up. Expect the temperature to dip as low as -26°C (-14°F) and occasionally rise to a maximum of 13°C (56°F). With an average precipitation of 34 mm (1.3 in) over the course of 6 days, keep an umbrella handy! Coupled with an average humidity of 84%, the climate can feel quite crisp and damp—ideal for enjoying cozy indoor activities or outdoor winter sports!
In December in Clear Lake, the average temperature is -5°C (24°F), with a maximum that can reach 13°C (56°F) and a minimum that can drop as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures, so dressing in layers and bringing warm clothing is essential.
In Clear Lake in December, the total precipitation amount is 34 mm (1.3 in) spread over 6 days.
In Clear Lake in December, humidity is 84%. With an average temperature of -5°C (24°F), this humidity feels like an icy blanket wrapped around you, making the air feel even colder and more biting, which can be quite uncomfortable for traveling.
In Clear 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 Clear Lake, you can visit Hourly UV Index in Clear Lake.
UV Risk Categories
Weather in Clear Lake varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Clear Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -10°C (15°F) | 23 mm (0.9 inches) | 85% | moderate |
| February Weather | -10°C (15°F) | 19 mm (0.7 inches) | 89% | moderate |
| March Weather | -1°C (31°F) | 55 mm (2.2 inches) | 81% | high |
| April Weather | 5°C (41°F) | 72 mm (2.8 inches) | 82% | very high |
| May Weather | 13°C (56°F) | 98 mm (3.9 inches) | 76% | very high |
| June Weather | 21°C (70°F) | 86 mm (3.4 inches) | 81% | very high |
| July Weather | 23°C (73°F) | 96 mm (3.8 inches) | 82% | very high |
| August Weather | 21°C (69°F) | 124 mm (4.9 inches) | 83% | very high |
| September Weather | 17°C (63°F) | 91 mm (3.6 inches) | 82% | very high |
| October Weather | 7°C (46°F) | 80 mm (3.1 inches) | 82% | moderate |
| November Weather | 0°C (33°F) | 28 mm (1.1 inches) | 87% | moderate |
| December Weather | -5°C (24°F) | 34 mm (1.3 inches) | 84% | low |