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December Weather in Green Valley, United States

Last updated: June 24, 2025

In Green Valley, United States, the average temperature in December is a mild 11°C (52°F). Expect temperature variations with a minimum of -3°C (26°F) and a pleasant maximum of 25°C (78°F). While you're enjoying the weather, be prepared for about 22 mm (0.9 in) of precipitation over 3 days. With an average humidity of 81%, remember to stay refreshed!

December Temperature in Green Valley

In December in Green Valley, the average temperature is 11°C (52°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -3°C (26°F). This unpredictable weather makes it essential for travelers to pack layers to stay comfortable during their visit.

December Weather in Green Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Green Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Green Valley, December typically has an average temperature of 11°C (52°F), with highs reaching up to 25°C (78°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec515259687484838279696151
Data source: Temperature data for Green Valley 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 Green Valley

In Green Valley in December, the precipitation amount is 22 mm (0.9 in) over a span of 3 days.

December Precipitation Trends in Green Valley

The chart displays monthly precipitation patterns in Green Valley, 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 Green Valley, December typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec223116449746237111522
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Green Valley

In Green Valley in December humidity is 81%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make outdoor excursions quite uncomfortable, causing a muggy heaviness that dampens clothes and leaves travelers longing for dryer weather.

December Average Humidity in Green Valley

This chart illustrates the average monthly humidity levels in Green Valley, 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 Green Valley is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%71%60%43%32%28%38%60%72%66%74%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Green Valley

In Green Valley 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 Green Valley.

Maximum UV Index Levels in Green Valley for December

The chart shows the monthly maximum UV Index (UVI) for Green Valley 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 Green Valley typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710121213121211965
Data source: Green Valley 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 Green Valley Compares to Other Months

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

This table compares monthly weather conditions in Green Valley, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)22 mm (0.9 inches)74%moderate
February Weather11°C (53°F)31 mm (1.2 inches)71%high
March Weather15°C (59°F)16 mm (0.6 inches)60%very high
April Weather20°C (68°F)4 mm (0.2 inches)43%extreme
May Weather23°C (74°F)4 mm (0.1 inches)32%extreme
June Weather29°C (84°F)9 mm (0.3 inches)28%extreme
July Weather28°C (83°F)74 mm (2.9 inches)38%extreme
August Weather28°C (82°F)62 mm (2.4 inches)60%extreme
September Weather26°C (79°F)37 mm (1.5 inches)72%extreme
October Weather21°C (70°F)11 mm (0.4 inches)66%very high
November Weather16°C (61°F)15 mm (0.6 inches)74%high
December Weather11°C (52°F)22 mm (0.9 inches)81%moderate

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