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December Weather in Riverton, United States

Last updated: June 24, 2025

In December, the average temperature in Riverton, United States is a cool 6°C (43°F). Expect a range from a chilly -12°C (12°F) to a comfortable 24°C (75°F). During this month, you'll encounter 49 mm (1.9 in) of precipitation over approximately 5 days, with humidity levels averaging around 87%. Be prepared for a mix of brisk air and occasional rain!

December Temperature in Riverton

In December in Riverton, the average temperature is 6°C (43°F). The maximum can reach 24°C (75°F), while the minimum can drop to as low as -12°C (12°F). Be sure to pack a variety of clothing layers to comfortably adapt to the temperature changes during your travels.

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

The chart illustrates December temperature patterns in Riverton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riverton, December typically has an average temperature of 6°C (43°F), with highs reaching up to 24°C (75°F) and lows dropping to around -12°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec373951576878817874604843
Data source: Temperature data for Riverton 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 Riverton

In Riverton in December, the precipitation amount is 49 mm (1.9 in) spread over a period of 5 days.

December Precipitation Trends in Riverton

The chart displays monthly precipitation patterns in Riverton, 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 Riverton, December typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec786813913320692102110841355650
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Riverton

In Riverton in December, humidity is 87%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating warm, breathable layers for traveling.

December Average Humidity in Riverton

This chart illustrates the average monthly humidity levels in Riverton, 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 Riverton is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Riverton

In Riverton 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 Riverton, you can check the information here.

Maximum UV Index Levels in Riverton for December

The chart shows the monthly maximum UV Index (UVI) for Riverton 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 Riverton typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Riverton 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 Riverton Compares to Other Months

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

This table compares monthly weather conditions in Riverton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)78 mm (3.1 inches)81%moderate
February Weather4°C (39°F)68 mm (2.7 inches)78%high
March Weather11°C (51°F)139 mm (5.5 inches)76%high
April Weather14°C (58°F)133 mm (5.2 inches)78%very high
May Weather20°C (68°F)206 mm (8.1 inches)83%very high
June Weather25°C (78°F)92 mm (3.6 inches)83%extreme
July Weather27°C (81°F)102 mm (4.0 inches)78%extreme
August Weather26°C (79°F)110 mm (4.3 inches)68%very high
September Weather24°C (75°F)84 mm (3.3 inches)64%very high
October Weather16°C (60°F)135 mm (5.3 inches)70%high
November Weather9°C (48°F)56 mm (2.2 inches)83%moderate
December Weather6°C (43°F)49 mm (1.9 inches)87%moderate

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