December weather forecast
Arizona, USA

December in Arizona is a month of contrasts, where the south remains relatively mild while the northern areas feel the winter's cold grip. The month ushers in the colder season, and with it comes a range of weather experiences depending on the region.

The southern desert areas, including cities like Phoenix, maintain a mild climate even in December. Daytime temperatures generally lie between 65°F (18.3°C) and 75°F (23.9°C), making it quite pleasant for various activities. However, nights introduce a cooler feel, with temperatures typically ranging from 45°F (7.2°C) to 55°F (12.8°C). Rain events can occasionally punctuate the mostly clear skies, but they remain infrequent.

In stark contrast, the northern highlands and areas like Flagstaff fully enter the winter mode. Day temperatures often oscillate between 35°F (1.7°C) and 45°F (7.2°C). Nights can be significantly colder, sometimes plunging to between 15°F (-9.4°C) and 25°F (-3.9°C). Snow becomes a more common sight, particularly in the elevated regions, lending a white blanket to the landscape. The snow-capped peaks and frosty mornings encapsulate the winter feel of the region.

When juxtaposed with November, December solidifies its position as the beginning of the winter season in Arizona. The differences in temperatures between the southern and northern regions become more pronounced, showcasing the state's diverse climate. As December progresses, the chill deepens, setting the stage for the heart of winter in the subsequent months.

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• Phoenix - December »
  December stands out as Phoenix's coldest month, with an average high-temperature of 63°F (17.2°C) and a low-temperature of 47.8°F (8.8°C). The month with the least sunshine in Phoenix is December, with an average of 6.8h of sunshine.
• Tucson - December »
  The month with the shortest days in Tucson is December, with an average of 10h and 6min of daylight. December is the most humid month in Tucson, with an average relative humidity of 45%.
• Mesa - December »
  The month with the shortest days in Mesa is December, with an average of 10h and 0min of daylight. As the end-of-year month arrives, December's weather in Mesa, Arizona presents a full-fledged winter scenario.
• Chandler - December »
  The month with the shortest days in Chandler is December, with an average of 10h and 0min of daylight. With average temperatures fluctuating between a high of 62.6°F (17°C) and a low of 46.9°F (8.3°C), December stands out as the coldest month in Chandler, Arizona.
• Scottsdale - December »
  With an average relative humidity of 44%, December is the most humid month in Scottsdale, Arizona. In Scottsdale in December, during 6.5 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.
• Glendale - December »
  With average high temperatures of 61.9°F (16.6°C) and lows of 46.8°F (8.2°C), December is the coldest month in Glendale, Arizona. With an average of 10h and 0min of daylight, December has the shortest days of the year in Glendale, Arizona.
• Gilbert - December »
  The most humid month in Gilbert, Arizona, is December, with an average relative humidity of 44%. With an average maximum UV index of 3, December is the month with the lowest UV index in Gilbert, Arizona.
• Tempe - December »
  December is the coldest month of the year in Tempe, registering average temperatures as high as 62.8°F (17.1°C) and as low as 47.3°F (8.5°C). With a decent measure of almost 0.87" (22mm) of rain spread over 6.5 days, December wraps up the year with a semblance of a mild winter for Tempe.
• Peoria - December »
  December, on average, is the coldest month in Peoria, Arizona, registering a high temperature of 61.9°F (16.6°C) and a low of 46.8°F (8.2°C). The month with the least sunshine in Peoria, Arizona, is December, with an average of 6.8h of sunshine.
• Surprise - December »
  In Surprise, the month of December is known for its lowest average temperatures, reaching a high of 61.7°F (16.5°C) and a low of 46°F (7.8°C). December is the most humid month in Surprise with an average relative humidity of 44%.
• Yuma - December »
  December proves to be the coldest month in Yuma, recording an average maximum temperature of 66°F (18.9°C) and a minimum temperature of 50.5°F (10.3°C). In Yuma, December is the month with the lowest recorded average temperatures, measuring a high of 66°F (18.9°C) and a low of 50.5°F (10.3°C).