December Weather in Mankato, United States

Last updated: June 24, 2025

In December, the average temperature in Mankato, 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 Mankato

In December in Mankato, 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 Mankato: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Mankato, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mankato, 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).

Data source: Temperature data for Mankato generated using information from the Copernicus Climate Change Service.

December Precipitation in Mankato

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

December Precipitation Trends in Mankato

The chart displays monthly precipitation patterns in Mankato, 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 Mankato, December typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Mankato

In Mankato 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 Mankato

This chart illustrates the average monthly humidity levels in Mankato, 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 Mankato is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Mankato

In Mankato 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 Mankato, you can visit Hourly UV Index in Mankato.

Maximum UV Index Levels in Mankato for December

The chart shows the monthly maximum UV Index (UVI) for Mankato 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 Mankato typically reaches 2, which falls under the low exposure category.

Data source: Mankato 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 Mankato Compares to Other Months

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

This table compares monthly weather conditions in Mankato, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
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 Weather	1°C (34°F)	67 mm (2.6 inches)	85%	moderate
April Weather	7°C (44°F)	88 mm (3.5 inches)	84%	very high
May Weather	15°C (60°F)	130 mm (5.1 inches)	78%	very high
June Weather	22°C (72°F)	106 mm (4.2 inches)	80%	very high
July Weather	24°C (75°F)	121 mm (4.8 inches)	81%	very high
August Weather	22°C (71°F)	128 mm (5.1 inches)	81%	very high
September Weather	18°C (65°F)	142 mm (5.6 inches)	81%	very high
October Weather	9°C (49°F)	91 mm (3.6 inches)	84%	moderate
November Weather	1°C (34°F)	33 mm (1.3 inches)	88%	moderate
December Weather	-4°C (25°F)	43 mm (1.7 inches)	84%	low