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December Weather in Black Rock, United States

Last updated: June 24, 2025

In Black Rock, United States during December, the average temperature hovers around 0°C (33°F). Temperatures can dip to a chilly -21°C (-5°F) at their lowest and rise to a mild 16°C (61°F) at their peak. Prepare for occasional rain, with an average precipitation of 32 mm (1.3 in) spread over 6 days. Humidity remains high at 82%, creating a refreshing yet brisk atmosphere throughout the month.

December Temperature in Black Rock

In December in Black Rock, the average temperature is 0°C (33°F). Maximums can reach 16°C (61°F), while minimums can drop as low as -21°C (-5°F). Be prepared for a wide range of temperatures when traveling, as layering your clothing will help you stay comfortable.

December Weather in Black Rock: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Black Rock, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Black Rock, December typically has an average temperature of 0°C (33°F), with highs reaching up to 16°C (61°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec303443526072737266534333
Data source: Temperature data for Black Rock 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 Black Rock

In Black Rock in December, the total precipitation amount is 32 mm (1.3 in) over the course of 6 days.

December Precipitation Trends in Black Rock

The chart displays monthly precipitation patterns in Black Rock, 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 Black Rock, December typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec383737221610672529261832
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Black Rock

In Black Rock in December, humidity is 82%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures feel much colder than the mercury suggests, and reminding you to bundle up as you explore.

December Average Humidity in Black Rock

This chart illustrates the average monthly humidity levels in Black Rock, 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 Black Rock is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%83%71%61%48%36%37%46%62%74%82%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Black Rock

In Black Rock 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 Black Rock.

Maximum UV Index Levels in Black Rock for December

The chart shows the monthly maximum UV Index (UVI) for Black Rock 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 Black Rock typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111213131211865
Data source: Black Rock 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 Black Rock Compares to Other Months

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

This table compares monthly weather conditions in Black Rock, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)38 mm (1.5 inches)81%moderate
February Weather1°C (35°F)37 mm (1.5 inches)83%high
March Weather6°C (43°F)37 mm (1.5 inches)71%very high
April Weather11°C (52°F)22 mm (0.9 inches)61%extreme
May Weather16°C (60°F)16 mm (0.6 inches)48%extreme
June Weather22°C (72°F)10 mm (0.4 inches)36%extreme
July Weather23°C (74°F)67 mm (2.6 inches)37%extreme
August Weather22°C (72°F)25 mm (1.0 inches)46%extreme
September Weather19°C (66°F)29 mm (1.1 inches)62%extreme
October Weather12°C (54°F)26 mm (1.0 inches)74%very high
November Weather6°C (44°F)18 mm (0.7 inches)82%high
December Weather0°C (33°F)32 mm (1.3 inches)82%moderate

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