Last updated: June 24, 2025
In December, the average temperature in Grand Mound, United States hovers around 0°C (32°F). Expect fluctuations, with minima plunging to -22°C (-7°F) and maxima soaring up to 21°C (71°F). During this month, the region receives an average precipitation of 47 mm (1.9 in) over 6 days, coupled with a notable humidity level of 84%.
In December in Grand Mound, the average temperature is 0°C (32°F). Maximums can reach 21°C (71°F), and minimums can drop as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures, from chilly to mild, making it essential to pack layers for this time of year.
In Grand Mound in December, the precipitation amount is 47 mm (1.9 in) over the course of 6 days.
In Grand Mound in December, humidity is 84%. With an average temperature of 0°C (32°F), this humidity feels like a cold, damp chill that seeps into your clothes, making traveling uncomfortable and necessitating extra layers to stay warm despite the moisture-laden air.
In Grand Mound 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 Grand Mound, you can visit Hourly UV Index in Grand Mound.
UV Risk Categories
Weather in Grand Mound varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grand Mound, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 52 mm (2.1 inches) | 81% | moderate |
| February Weather | -4°C (25°F) | 59 mm (2.3 inches) | 81% | moderate |
| March Weather | 4°C (39°F) | 82 mm (3.2 inches) | 81% | high |
| April Weather | 9°C (49°F) | 96 mm (3.8 inches) | 82% | very high |
| May Weather | 17°C (62°F) | 140 mm (5.5 inches) | 78% | very high |
| June Weather | 23°C (73°F) | 121 mm (4.7 inches) | 81% | extreme |
| July Weather | 25°C (76°F) | 76 mm (3.0 inches) | 79% | very high |
| August Weather | 23°C (73°F) | 84 mm (3.3 inches) | 77% | very high |
| September Weather | 20°C (68°F) | 119 mm (4.7 inches) | 78% | very high |
| October Weather | 12°C (54°F) | 119 mm (4.7 inches) | 78% | high |
| November Weather | 3°C (39°F) | 49 mm (1.9 inches) | 87% | moderate |
| December Weather | 0°C (32°F) | 47 mm (1.9 inches) | 84% | low |