Last updated: June 24, 2025
In December, the average temperature in Sac City, United States hovers around -2°C (29°F), but can swing dramatically, with minimums plummeting to -23°C (-10°F) and maximums reaching 21°C (70°F). Precipitation is modest, with about 39 mm (1.5 in) falling over 5 days, while humidity remains high at an average of 83%. Be prepared for a variety of weather conditions during your visit!
In December in Sac City, the average temperature is -2°C (29°F), with maximums reaching 21°C (70°F) and minimums dropping as low as -23°C (-10°F). It’s a time for travelers to prepare for significant temperature fluctuations and enjoy a unique winter experience.
In Sac City in December, the precipitation amount is 39 mm (1.5 in) spread over a duration of 5 days.
In Sac City 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 Sac City 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 Sac City, you can visit Hourly UV Index in Sac City.
UV Risk Categories
Weather in Sac City varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sac City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 26 mm (1.0 inches) | 80% | moderate |
| February Weather | -6°C (22°F) | 42 mm (1.6 inches) | 84% | moderate |
| March Weather | 3°C (38°F) | 75 mm (2.9 inches) | 75% | moderate |
| April Weather | 8°C (47°F) | 74 mm (2.9 inches) | 79% | very high |
| May Weather | 16°C (61°F) | 147 mm (5.8 inches) | 74% | very high |
| June Weather | 23°C (74°F) | 114 mm (4.5 inches) | 81% | extreme |
| July Weather | 24°C (76°F) | 67 mm (2.6 inches) | 82% | very high |
| August Weather | 22°C (72°F) | 110 mm (4.3 inches) | 80% | very high |
| September Weather | 19°C (67°F) | 104 mm (4.1 inches) | 75% | very high |
| October Weather | 10°C (50°F) | 107 mm (4.2 inches) | 77% | high |
| November Weather | 3°C (37°F) | 36 mm (1.4 inches) | 85% | moderate |
| December Weather | -2°C (29°F) | 39 mm (1.5 inches) | 83% | low |