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December Weather in Junction, United States

Last updated: June 24, 2025

In December, the average temperature in Junction, United States hovers around 11°C (53°F). Expect a wide range with minimums dipping to -4°C (24°F) and maximums reaching 29°C (84°F). You'll also encounter precipitation averaging 29 mm (1.1 in) over 4 days, complemented by a notably high humidity level of 87%.

December Temperature in Junction

In December in Junction, the average temperature is 11°C (53°F), with maximums reaching 29°C (84°F) and minimums dropping as low as -4°C (24°F). This diverse temperature range makes it essential to pack layers for your trip.

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

The chart illustrates December temperature patterns in Junction, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Junction, December typically has an average temperature of 11°C (53°F), with highs reaching up to 29°C (84°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec495262677581848478685853
Data source: Temperature data for Junction 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 Junction

In Junction in December, the precipitation amount is 29 mm (1.1 in) over a span of 4 days.

December Precipitation Trends in Junction

The chart displays monthly precipitation patterns in Junction, 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 Junction, December typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec3135625413744263676591929
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Junction

In Junction in December, humidity is 87%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that clings to your skin, making it uncomfortable for traveling as it combines the cool air with a sense of heaviness, leaving you yearning for warmth and dryness.

December Average Humidity in Junction

This chart illustrates the average monthly humidity levels in Junction, 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 Junction is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Junction

In Junction in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Junction.

Maximum UV Index Levels in Junction for December

The chart shows the monthly maximum UV Index (UVI) for Junction 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 Junction typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111212121211965
Data source: Junction 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 Junction Compares to Other Months

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

This table compares monthly weather conditions in Junction, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)31 mm (1.2 inches)78%moderate
February Weather11°C (52°F)35 mm (1.4 inches)78%very high
March Weather17°C (62°F)62 mm (2.4 inches)77%very high
April Weather20°C (68°F)54 mm (2.1 inches)78%extreme
May Weather24°C (75°F)137 mm (5.4 inches)82%extreme
June Weather27°C (81°F)44 mm (1.7 inches)78%extreme
July Weather29°C (84°F)26 mm (1.0 inches)69%extreme
August Weather29°C (84°F)36 mm (1.4 inches)63%extreme
September Weather26°C (78°F)76 mm (3.0 inches)66%extreme
October Weather20°C (69°F)59 mm (2.3 inches)73%very high
November Weather14°C (58°F)19 mm (0.7 inches)84%high
December Weather11°C (53°F)29 mm (1.1 inches)87%moderate

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