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December Weather in Mankato, United States

Last updated: June 24, 2025

In December, the average temperature in Mankato, United States hovers around 1°C (34°F), with a minimum dipping as low as -17°C (2°F) and a maximum soaring to 23°C (74°F). Expect 39 mm (1.6 in) of precipitation spread over 3 days, contributing to an average humidity of 83%. Be prepared for chilly, damp days ahead!

December Temperature in Mankato

In December in Mankato, the average temperature is 1°C (34°F). Maximum temperatures can reach 23°C (74°F), while minimums can plummet to as low as -17°C (2°F). It's advisable to pack layers and be prepared for a wide range of weather conditions while exploring.

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 1°C (34°F), with highs reaching up to 23°C (74°F) and lows dropping to around -17°C (2°F).
JanFebMarAprMayJunJulAugSepOctNovDec292944526477817772544334
Data source: Temperature data for Mankato 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 Mankato

In Mankato in December, the total precipitation amount is 39 mm (1.6 in) over a span of 3 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 39 mm (1.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec2522774517671729965762040
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mankato

In Mankato in December, humidity is 83%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making travel uncomfortable as the damp cold seeps into your bones, adding an extra layer of heaviness to the air that can leave you feeling sluggish and fatigued.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%78%67%70%82%81%80%80%74%71%79%83%
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 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 Mankato, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
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.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)25 mm (1.0 inches)74%moderate
February Weather-2°C (30°F)21 mm (0.8 inches)78%moderate
March Weather6°C (44°F)77 mm (3.0 inches)67%high
April Weather11°C (53°F)45 mm (1.8 inches)70%very high
May Weather18°C (64°F)176 mm (6.9 inches)82%very high
June Weather25°C (78°F)71 mm (2.8 inches)81%extreme
July Weather27°C (81°F)72 mm (2.8 inches)80%extreme
August Weather25°C (77°F)99 mm (3.9 inches)80%very high
September Weather22°C (72°F)65 mm (2.6 inches)73%very high
October Weather12°C (55°F)76 mm (3.0 inches)71%high
November Weather6°C (43°F)20 mm (0.8 inches)79%moderate
December Weather1°C (34°F)39 mm (1.6 inches)83%moderate

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