Last updated: June 24, 2025
In December, the average temperature in Saint Paul, United States hovers around -5°C (23°F). Expect extremes, with minimum temperatures plunging to -26°C (-15°F) and occasionally reaching a mild 13°C (56°F). Throughout the month, precipitation amounts to 53 mm (2.1 in) spread over 7 days, and the air maintains an average humidity of 84%. Stay warm and prepared for a chilly atmosphere!
In December in Saint Paul, average temperature is -5°C (23°F). Maximum can reach 13°C (56°F) and minimum can be as low as -26°C (-15°F). It’s advisable to pack warm clothing and be prepared for cold weather conditions if you plan to travel during this time.
In Saint Paul in December, the total precipitation amount is 53 mm (2.1 in) spread over a period of 7 days.
In Saint Paul in December, humidity is 84%. With an average temperature of -5°C (23°F), this humidity feels like an icy blanket wrapping around you, making the cold air bite even deeper and turning travel into a brisk, challenging adventure where each breath comes with a frosty reminder of the chill.
In Saint Paul 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 Saint Paul, you can visit Hourly UV Index in Saint Paul.
UV Risk Categories
Weather in Saint Paul varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint Paul, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (17°F) | 28 mm (1.1 inches) | 87% | low |
| February Weather | -8°C (17°F) | 35 mm (1.4 inches) | 90% | moderate |
| March Weather | 0°C (33°F) | 56 mm (2.2 inches) | 85% | moderate |
| April Weather | 6°C (43°F) | 88 mm (3.5 inches) | 84% | high |
| May Weather | 15°C (59°F) | 134 mm (5.3 inches) | 78% | very high |
| June Weather | 22°C (71°F) | 91 mm (3.6 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 104 mm (4.1 inches) | 81% | very high |
| August Weather | 22°C (71°F) | 125 mm (4.9 inches) | 81% | very high |
| September Weather | 18°C (64°F) | 114 mm (4.5 inches) | 81% | high |
| October Weather | 9°C (49°F) | 101 mm (4.0 inches) | 84% | moderate |
| November Weather | 1°C (34°F) | 37 mm (1.4 inches) | 88% | moderate |
| December Weather | -5°C (23°F) | 53 mm (2.1 inches) | 84% | low |