Last updated: June 24, 2025
In December, the average temperature in Flandreau, United States hovers around -4°C (25°F), with extremes ranging from a chilly -26°C (-14°F) to a mild 14°C (58°F). Expect about 37 mm (1.5 in) of precipitation over approximately 4 days, adding to the average humidity of 83% that keeps the air crisp and refreshing.
In December in Flandreau, the average temperature is -4°C (25°F), with maximums reaching up to 14°C (58°F) and minimums dropping as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack appropriately for both chilly and milder conditions.
In Flandreau in December, the precipitation amount is 37 mm (1.5 in) over the course of 4 days.
In Flandreau in December, humidity is 83%. With an average temperature of -4°C (25°F), this humidity feels like a chilling fog enveloping you, making every breath feel heavy and damp, which can quickly dampen the spirit of travel as you navigate the frosty landscape.
In Flandreau 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 Flandreau, you can visit Hourly UV Index in Flandreau.
UV Risk Categories
Weather in Flandreau varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Flandreau, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 21 mm (0.8 inches) | 80% | moderate |
| February Weather | -8°C (17°F) | 24 mm (0.9 inches) | 84% | moderate |
| March Weather | 0°C (33°F) | 59 mm (2.3 inches) | 75% | high |
| April Weather | 6°C (43°F) | 74 mm (2.9 inches) | 79% | very high |
| May Weather | 14°C (58°F) | 118 mm (4.6 inches) | 74% | very high |
| June Weather | 22°C (71°F) | 91 mm (3.6 inches) | 81% | extreme |
| July Weather | 23°C (74°F) | 103 mm (4.1 inches) | 82% | very high |
| August Weather | 21°C (70°F) | 114 mm (4.5 inches) | 80% | very high |
| September Weather | 18°C (64°F) | 109 mm (4.3 inches) | 75% | very high |
| October Weather | 8°C (47°F) | 80 mm (3.1 inches) | 77% | moderate |
| November Weather | 1°C (33°F) | 28 mm (1.1 inches) | 85% | moderate |
| December Weather | -4°C (25°F) | 37 mm (1.5 inches) | 83% | low |