nomadseason

December Weather in Riverton, United States

Last updated: June 24, 2025

In December, the average temperature in Riverton, United States hovers around -4°C (24°F), with extremes reaching as low as -23°C (-8°F) and peaking at 17°C (63°F). This chilly month brings about 16 mm (0.6 in) of precipitation over 4 days, contributing to an average humidity of 89%. Stay prepared for the cold!

December Temperature in Riverton

In December in Riverton, the average temperature is -4°C (24°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -23°C (-8°F). It's essential to pack warm clothing and be prepared for a range of temperatures when traveling during this time.

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 -4°C (24°F), with highs reaching up to 17°C (63°F) and lows dropping to around -23°C (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec212336415265737061433424
Data source: Temperature data for Riverton generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 16 mm (0.6 in) over a span of 4 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 16 mm (0.6 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec152338618031212327311716
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Riverton

In Riverton in December, humidity is 89%. With an average temperature of -4°C (24°F), this humidity feels like an unexpected chill that can make outdoor activities uncomfortable, turning even short walks into a brisk challenge as the dampness seeps into your clothing.

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 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%82%72%69%67%65%59%59%69%83%89%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
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 Weather-6°C (22°F)15 mm (0.6 inches)90%moderate
February Weather-5°C (23°F)23 mm (0.9 inches)89%moderate
March Weather2°C (36°F)38 mm (1.5 inches)82%high
April Weather5°C (42°F)61 mm (2.4 inches)72%very high
May Weather11°C (52°F)80 mm (3.2 inches)69%very high
June Weather18°C (65°F)30 mm (1.2 inches)67%extreme
July Weather23°C (73°F)21 mm (0.8 inches)65%extreme
August Weather21°C (70°F)23 mm (0.9 inches)59%very high
September Weather16°C (61°F)27 mm (1.1 inches)59%very high
October Weather6°C (43°F)31 mm (1.2 inches)69%high
November Weather1°C (35°F)17 mm (0.7 inches)83%moderate
December Weather-4°C (24°F)16 mm (0.6 inches)89%moderate

Compare Riverton's Climate with Cities Worldwide