Last updated: June 24, 2025
In December, the average temperature in Garnavillo, United States hovers around -2°C (29°F). However, be prepared for a temperature range that can dip to a chilly -22°C (-7°F) or rise to a pleasant 21°C (69°F). During this month, you can expect about 40 mm (1.6 in) of precipitation over 6 days, with average humidity resting at a brisk 82%. Stay warm and ready for a mix of weather in this unique locale!
In December in Garnavillo, the average temperature is -2°C (29°F). Maximum temperatures can reach 21°C (69°F), while minimums can drop as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for both chilly days and potential warm spells.
In Garnavillo in December, the precipitation amount is 40 mm (1.6 in) over the course of 6 days.
In Garnavillo in December, humidity is 82%. With an average temperature of -2°C (29°F), this humidity feels like a frigid chill that seeps into your bones, making travel quite uncomfortable and forcing you to bundle up tightly to ward off the damp cold that lingers in the air.
In Garnavillo 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 Garnavillo, you can visit Hourly UV Index in Garnavillo.
UV Risk Categories
Weather in Garnavillo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Garnavillo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 44 mm (1.7 inches) | 84% | moderate |
| February Weather | -6°C (22°F) | 56 mm (2.2 inches) | 85% | moderate |
| March Weather | 2°C (37°F) | 62 mm (2.5 inches) | 84% | moderate |
| April Weather | 8°C (47°F) | 78 mm (3.1 inches) | 83% | very high |
| May Weather | 16°C (60°F) | 150 mm (5.9 inches) | 75% | very high |
| June Weather | 22°C (72°F) | 130 mm (5.1 inches) | 79% | very high |
| July Weather | 24°C (75°F) | 103 mm (4.0 inches) | 75% | very high |
| August Weather | 22°C (71°F) | 87 mm (3.4 inches) | 69% | very high |
| September Weather | 19°C (66°F) | 120 mm (4.7 inches) | 74% | very high |
| October Weather | 10°C (51°F) | 133 mm (5.2 inches) | 79% | moderate |
| November Weather | 2°C (36°F) | 47 mm (1.9 inches) | 88% | moderate |
| December Weather | -2°C (29°F) | 40 mm (1.6 inches) | 82% | low |