Last updated: June 24, 2025
In December, the average temperature in Calmar, United States hovers around -3°C (28°F), with a possibility of plunging to a chilling -23°C (-9°F) or peaking at a cozy 20°C (68°F). During this period, residents can expect approximately 38 mm (1.5 in) of precipitation spread over 6 days, with average humidity levels reaching a notable 82%.
In December in Calmar, the average temperature is -3°C (28°F), with maximums reaching up to 20°C (68°F) and minimums dropping as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack accordingly for both cold and mild weather.
In Calmar in December, the total precipitation amount is 38 mm (1.5 in) spread over 6 days.
In Calmar in December humidity is 82%. With an average temperature of -3°C (28°F), this humidity feels like a biting chill that penetrates your layers, making outdoor travel uncomfortable and requiring extra preparation to avoid the damp cold settling into your bones.
In Calmar 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 Calmar, you can visit Hourly UV Index in Calmar.
UV Risk Categories
Weather in Calmar varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Calmar, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 39 mm (1.5 inches) | 84% | moderate |
| February Weather | -7°C (20°F) | 52 mm (2.0 inches) | 85% | moderate |
| March Weather | 2°C (35°F) | 64 mm (2.5 inches) | 84% | moderate |
| April Weather | 7°C (45°F) | 80 mm (3.2 inches) | 83% | very high |
| May Weather | 15°C (59°F) | 155 mm (6.1 inches) | 75% | very high |
| June Weather | 22°C (71°F) | 130 mm (5.1 inches) | 79% | very high |
| July Weather | 23°C (74°F) | 106 mm (4.2 inches) | 75% | very high |
| August Weather | 21°C (70°F) | 109 mm (4.3 inches) | 69% | very high |
| September Weather | 18°C (65°F) | 123 mm (4.8 inches) | 74% | very high |
| October Weather | 10°C (50°F) | 133 mm (5.2 inches) | 79% | moderate |
| November Weather | 2°C (35°F) | 53 mm (2.1 inches) | 88% | moderate |
| December Weather | -3°C (28°F) | 38 mm (1.5 inches) | 82% | low |