December Weather in Rolla, United States

Last updated: June 24, 2025

In December, the average temperature in Rolla, United States hovers around -10°C (15°F). However, be prepared for extremes, as temperatures can plummet to a chilling -38°C (-35°F) or rise to a milder 8°C (47°F). Expect some precipitation, with an average of 23 mm (0.9 in) spread over 7 days. Don't forget, the average humidity is a crisp 91%, adding to the chilly atmosphere of the season!

December Temperature in Rolla

In December in Rolla, the average temperature is -10°C (15°F), with maximums reaching 8°C (47°F) and minimums plummeting to -38°C (-35°F). It is advisable to prepare for severe cold conditions and dress warmly if you plan to travel during this time.

December Weather in Rolla: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rolla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rolla, December typically has an average temperature of -10°C (15°F), with highs reaching up to 8°C (47°F) and lows dropping to around -38°C (-35°F).

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

December Precipitation in Rolla

In Rolla in December, the total precipitation amount is 23 mm (0.9 in) over a duration of 7 days.

December Precipitation Trends in Rolla

The chart displays monthly precipitation patterns in Rolla, 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 Rolla, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 7 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 Rolla

In Rolla in December humidity is 91%. With an average temperature of -10°C (15°F), this humidity feels like an eerie chill that penetrates your bones, making outdoor travel uncomfortable and increasing the risk of frostbite, even with layers of clothing.

December Average Humidity in Rolla

This chart illustrates the average monthly humidity levels in Rolla, 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 Rolla is approximately 91%, 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 Rolla

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

Maximum UV Index Levels in Rolla for December

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

Data source: Rolla 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 Rolla Compares to Other Months

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

This table compares monthly weather conditions in Rolla, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-13°C (8°F)	15 mm (0.6 inches)	92%	low
February Weather	-15°C (5°F)	16 mm (0.6 inches)	90%	moderate
March Weather	-5°C (24°F)	23 mm (0.9 inches)	88%	moderate
April Weather	2°C (36°F)	22 mm (0.9 inches)	81%	very high
May Weather	11°C (53°F)	42 mm (1.7 inches)	74%	very high
June Weather	18°C (65°F)	78 mm (3.1 inches)	72%	very high
July Weather	20°C (69°F)	59 mm (2.3 inches)	74%	very high
August Weather	18°C (65°F)	70 mm (2.8 inches)	76%	very high
September Weather	13°C (56°F)	73 mm (2.9 inches)	73%	high
October Weather	5°C (41°F)	51 mm (2.0 inches)	76%	moderate
November Weather	-4°C (24°F)	26 mm (1.0 inches)	86%	low
December Weather	-10°C (15°F)	23 mm (0.9 inches)	91%	low