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December Weather in Saint Peter, United States

Last updated: June 24, 2025

In December, the average temperature in Saint Peter, United States hovers around -4°C (25°F), making it a chilly time of year. Expect temperatures to dip as low as -24°C (-12°F) at times, while the mercury can rise to a maximum of 17°C (63°F). With an average precipitation of 43 mm (1.7 in) over 5 days, and a high average humidity of 84%, it's wise to prepare for a damp and crisp atmosphere.

December Temperature in Saint Peter

In December in Saint Peter, the average temperature is -4°C (25°F). Maximum temperatures can reach 17°C (63°F), while minimums can drop as low as -24°C (-12°F). Travelers should be prepared for a wide range of temperatures and dress accordingly.

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

The chart illustrates December temperature patterns in Saint Peter, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Peter, December typically has an average temperature of -4°C (25°F), with highs reaching up to 17°C (63°F) and lows dropping to around -24°C (-12°F).
JanFebMarAprMayJunJulAugSepOctNovDec171633446072747165493424
Data source: Temperature data for Saint Peter 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 Peter

In Saint Peter in December, the precipitation amount is 43 mm (1.7 in) over the course of 5 days.

December Precipitation Trends in Saint Peter

The chart displays monthly precipitation patterns in Saint Peter, 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 Peter, December typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec32356788130106121129142913343
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint Peter

In Saint Peter in December, humidity is 84%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

December Average Humidity in Saint Peter

This chart illustrates the average monthly humidity levels in Saint Peter, 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 Peter is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint Peter

In Saint Peter 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 Peter, you can visit Hourly UV Index in Saint Peter.

Maximum UV Index Levels in Saint Peter for December

The chart shows the monthly maximum UV Index (UVI) for Saint Peter 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 Peter typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589101098532
Data source: Saint Peter 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 Peter Compares to Other Months

Weather in Saint Peter varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint Peter, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Saint Peter, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)32 mm (1.3 inches)87%moderate
February Weather-9°C (16°F)35 mm (1.4 inches)90%moderate
March Weather1°C (34°F)67 mm (2.6 inches)85%moderate
April Weather7°C (44°F)88 mm (3.5 inches)84%very high
May Weather15°C (60°F)130 mm (5.1 inches)78%very high
June Weather22°C (72°F)106 mm (4.2 inches)80%very high
July Weather24°C (75°F)121 mm (4.8 inches)81%very high
August Weather22°C (71°F)128 mm (5.1 inches)81%very high
September Weather18°C (65°F)142 mm (5.6 inches)81%very high
October Weather9°C (49°F)91 mm (3.6 inches)84%moderate
November Weather1°C (34°F)33 mm (1.3 inches)88%moderate
December Weather-4°C (25°F)43 mm (1.7 inches)84%low

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