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December Weather in Riner, United States

Last updated: June 24, 2025

In December, the average temperature in Riner, United States hovers around 4°C (40°F). Expect a chilly minimum of -14°C (7°F), while the maximum can reach a pleasant 20°C (69°F). During this month, 93 mm (3.7 in) of precipitation is anticipated over 9 days, with an average humidity of 86%.

December Temperature in Riner

In December in Riner, the average temperature is 4°C (40°F). Maximums can reach 20°C (69°F), while minimums can drop as low as -14°C (7°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates December temperature patterns in Riner, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riner, December typically has an average temperature of 4°C (40°F), with highs reaching up to 20°C (69°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec354146546369747267584440
Data source: Temperature data for Riner 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 Riner

In Riner in December, the precipitation amount is 93 mm (3.7 in) over the course of 9 days.

December Precipitation Trends in Riner

The chart displays monthly precipitation patterns in Riner, 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 Riner, December typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec6911084115125105801151151046693
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Riner

In Riner in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

December Average Humidity in Riner

This chart illustrates the average monthly humidity levels in Riner, 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 Riner is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Riner

In Riner 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 Riner, you can check the information here.

Maximum UV Index Levels in Riner for December

The chart shows the monthly maximum UV Index (UVI) for Riner 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 Riner typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Riner 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 Riner Compares to Other Months

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

This table compares monthly weather conditions in Riner, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)69 mm (2.7 inches)87%moderate
February Weather5°C (41°F)110 mm (4.3 inches)87%high
March Weather8°C (46°F)84 mm (3.3 inches)86%very high
April Weather12°C (54°F)115 mm (4.5 inches)84%very high
May Weather17°C (63°F)125 mm (4.9 inches)83%extreme
June Weather21°C (70°F)105 mm (4.1 inches)83%extreme
July Weather23°C (74°F)80 mm (3.2 inches)79%extreme
August Weather22°C (72°F)115 mm (4.5 inches)66%very high
September Weather20°C (67°F)115 mm (4.5 inches)68%very high
October Weather14°C (58°F)104 mm (4.1 inches)78%high
November Weather7°C (44°F)66 mm (2.6 inches)89%moderate
December Weather4°C (40°F)93 mm (3.7 inches)86%moderate

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