Last updated: June 24, 2025
In December, the average temperature in Shell Rock, United States hovers around -2°C (29°F). While temperatures can drop as low as -22°C (-7°F), they can also soar to a maximum of 22°C (71°F). Expect about 35 mm (1.4 in) of precipitation over approximately 5 days, with an average humidity level of 83%.
In December in Shell Rock, the average temperature is -2°C (29°F). Maximum temperatures can reach 22°C (71°F), while minimums can drop as low as -22°C (-7°F). Travelers should be prepared for significant temperature fluctuations during this time.
In Shell Rock in December, the precipitation amount is 35 mm (1.4 in) over a span of 5 days.
In Shell Rock in December, humidity is 83%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill that seeps into your bones, making travel outside feel particularly uncomfortable and brisk, as the damp air enhances the cold sensation, leaving you longing for warmth and shelter.
In Shell Rock 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 Shell Rock, you can check the information here.
UV Risk Categories
Weather in Shell Rock varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Shell Rock, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 40 mm (1.6 inches) | 82% | moderate |
| February Weather | -7°C (20°F) | 50 mm (2.0 inches) | 84% | moderate |
| March Weather | 2°C (36°F) | 72 mm (2.8 inches) | 80% | moderate |
| April Weather | 8°C (47°F) | 75 mm (2.9 inches) | 81% | very high |
| May Weather | 16°C (61°F) | 161 mm (6.3 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 126 mm (5.0 inches) | 80% | extreme |
| July Weather | 24°C (75°F) | 97 mm (3.8 inches) | 80% | very high |
| August Weather | 22°C (71°F) | 113 mm (4.5 inches) | 77% | very high |
| September Weather | 19°C (66°F) | 116 mm (4.6 inches) | 75% | very high |
| October Weather | 10°C (51°F) | 132 mm (5.2 inches) | 80% | moderate |
| November Weather | 2°C (36°F) | 48 mm (1.9 inches) | 87% | moderate |
| December Weather | -2°C (29°F) | 35 mm (1.4 inches) | 83% | moderate |