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December Weather in Helper, United States

Last updated: June 24, 2025

In Helper, United States, the average temperature in December hovers around -5°C (24°F). Expect chilly days, with minimums dipping to -21°C (-6°F) and maximums reaching up to 13°C (56°F). With an average humidity of 87% and about 33 mm (1.3 in) of precipitation spread over 7 days, make sure to bundle up and prepare for a wet winter experience!

December Temperature in Helper

In December in Helper, the average temperature is -5°C (24°F). Maximum temperatures can reach 13°C (56°F), while minimums can plunge as low as -21°C (-6°F). Be prepared for variable weather conditions if you plan to travel during this month.

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

The chart illustrates December temperature patterns in Helper, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Helper, December typically has an average temperature of -5°C (24°F), with highs reaching up to 13°C (56°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec222534415165716960433424
Data source: Temperature data for Helper 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 Helper

In Helper in December, the precipitation amount is 33 mm (1.3 in) over a period of 7 days.

December Precipitation Trends in Helper

The chart displays monthly precipitation patterns in Helper, 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 Helper, December typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec343642214315222222302633
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Helper

In Helper in December humidity is 87%. With an average temperature of -5°C (24°F), this humidity feels like an icy embrace that makes the cold penetrate deeper into your bones, adding a chilling dampness that can quickly dampen the spirits of even the most seasoned travelers.

December Average Humidity in Helper

This chart illustrates the average monthly humidity levels in Helper, 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 Helper is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%77%70%54%45%37%34%47%67%82%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Helper

In Helper 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 Helper, you can check the information here.

Maximum UV Index Levels in Helper for December

The chart shows the monthly maximum UV Index (UVI) for Helper 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 Helper typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110753
Data source: Helper 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 Helper Compares to Other Months

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

This table compares monthly weather conditions in Helper, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)34 mm (1.3 inches)87%moderate
February Weather-4°C (25°F)36 mm (1.4 inches)88%high
March Weather1°C (34°F)42 mm (1.6 inches)77%very high
April Weather5°C (42°F)21 mm (0.8 inches)69%very high
May Weather11°C (51°F)43 mm (1.7 inches)54%extreme
June Weather18°C (65°F)15 mm (0.6 inches)45%extreme
July Weather22°C (71°F)22 mm (0.9 inches)37%extreme
August Weather20°C (69°F)22 mm (0.9 inches)34%extreme
September Weather15°C (60°F)22 mm (0.9 inches)47%very high
October Weather6°C (43°F)30 mm (1.2 inches)67%high
November Weather1°C (34°F)26 mm (1.0 inches)82%moderate
December Weather-5°C (24°F)33 mm (1.3 inches)87%moderate

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