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December Weather in Saint Paul, United States

Last updated: June 24, 2025

In December, the average temperature in Saint Paul, United States hovers around -1°C (30°F), but be prepared for a wide range—temperatures can dip as low as -24°C (-11°F) or soar up to 20°C (69°F)! During this time, expect approximately 41 mm (1.6 in) of precipitation over about 4 days, accompanied by an average humidity level of 79%. Stay warm and enjoy the unique climate!

December Temperature in Saint Paul

In December in Saint Paul, the average temperature is -1°C (30°F), with maximums reaching 20°C (69°F) and minimums dropping as low as -24°C (-11°F). This wide temperature range suggests that travelers should be prepared for both chilly and relatively mild conditions during their visit.

December Weather in Saint Paul: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint Paul, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Paul, December typically has an average temperature of -1°C (30°F), with highs reaching up to 20°C (69°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec252540486074777468514030
Data source: Temperature data for Saint Paul generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Saint Paul

In Saint Paul in December, the precipitation amount is 41 mm (1.6 in) over the course of 4 days.

December Precipitation Trends in Saint Paul

The chart displays monthly precipitation patterns in Saint Paul, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Saint Paul, December typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec2518865614485668457882141
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint Paul

In Saint Paul in December, humidity is 79%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill in the air, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

December Average Humidity in Saint Paul

This chart illustrates the average monthly humidity levels in Saint Paul, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Saint Paul is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%81%69%71%80%83%84%84%77%72%80%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint Paul

In Saint Paul in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Saint Paul, you can check the information here.

Maximum UV Index Levels in Saint Paul for December

The chart shows the monthly maximum UV Index (UVI) for Saint Paul in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Saint Paul typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101110108643
Data source: Saint Paul December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Saint Paul Compares to Other Months

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.

This table compares monthly weather conditions in Saint Paul, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)25 mm (1.0 inches)73%moderate
February Weather-4°C (25°F)18 mm (0.7 inches)81%moderate
March Weather4°C (40°F)86 mm (3.4 inches)69%high
April Weather9°C (49°F)56 mm (2.2 inches)71%very high
May Weather16°C (61°F)144 mm (5.7 inches)80%very high
June Weather23°C (74°F)85 mm (3.3 inches)83%extreme
July Weather25°C (77°F)66 mm (2.6 inches)84%very high
August Weather23°C (74°F)84 mm (3.3 inches)84%very high
September Weather20°C (68°F)57 mm (2.2 inches)77%very high
October Weather10°C (51°F)88 mm (3.5 inches)72%high
November Weather4°C (40°F)21 mm (0.8 inches)80%moderate
December Weather-1°C (30°F)41 mm (1.6 inches)79%moderate

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