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December Weather in Rupert, United States

Last updated: June 24, 2025

In December, the average temperature in Rupert, United States hovers around 3°C (37°F). Expect a notable range, with minimums plunging to -16°C (4°F) and maximums reaching 19°C (66°F). The month welcomes 120 mm (4.7 in) of precipitation across approximately 14 days, creating a humid atmosphere with an average humidity of 86%.

December Temperature in Rupert

In December in Rupert, the average temperature is 3°C (37°F). Maximum temperatures can reach 19°C (66°F), while minimums can drop as low as -16°C (4°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates December temperature patterns in Rupert, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rupert, December typically has an average temperature of 3°C (37°F), with highs reaching up to 19°C (66°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec323742516167716965554137
Data source: Temperature data for Rupert 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 Rupert

In Rupert in December, the precipitation amount is 120 mm (4.7 in) over the course of 14 days.

December Precipitation Trends in Rupert

The chart displays monthly precipitation patterns in Rupert, 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 Rupert, December typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec10016512414616312510611110312681120
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rupert

In Rupert in December humidity is 86%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

December Average Humidity in Rupert

This chart illustrates the average monthly humidity levels in Rupert, 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 Rupert 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 Rupert

In Rupert 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 Rupert, you can check the information here.

Maximum UV Index Levels in Rupert for December

The chart shows the monthly maximum UV Index (UVI) for Rupert 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 Rupert typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Rupert 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 Rupert Compares to Other Months

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

This table compares monthly weather conditions in Rupert, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)100 mm (3.9 inches)87%moderate
February Weather3°C (38°F)165 mm (6.5 inches)87%high
March Weather6°C (43°F)124 mm (4.9 inches)86%very high
April Weather11°C (51°F)146 mm (5.8 inches)84%very high
May Weather16°C (61°F)163 mm (6.4 inches)83%extreme
June Weather19°C (67°F)125 mm (4.9 inches)83%extreme
July Weather22°C (71°F)106 mm (4.2 inches)79%extreme
August Weather21°C (69°F)111 mm (4.4 inches)66%very high
September Weather18°C (65°F)103 mm (4.0 inches)68%very high
October Weather13°C (56°F)126 mm (5.0 inches)78%high
November Weather5°C (41°F)81 mm (3.2 inches)89%moderate
December Weather3°C (37°F)120 mm (4.7 inches)86%moderate

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