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December Weather in Surprise, United States

Last updated: June 24, 2025

In December, the average temperature in Surprise, United States hovers around 12°C (54°F). Temperatures can vary quite a bit, with a minimum of 1°C (33°F) and a maximum of 28°C (82°F). Expect some rain, with precipitation amounting to 23 mm (0.9 in) over roughly 3 days. Humidity tends to be on the higher side, averaging around 82%.

December Temperature in Surprise

In December in Surprise, the average temperature is 12°C (54°F). Maximums can reach 28°C (82°F), while minimums can drop as low as 1°C (33°F). This variability makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates December temperature patterns in Surprise, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Surprise, December typically has an average temperature of 12°C (54°F), with highs reaching up to 28°C (82°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec545563738090939287746454
Data source: Temperature data for Surprise 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 Surprise

In Surprise in December, the precipitation amount is 23 mm (0.9 in) over the course of 3 days.

December Precipitation Trends in Surprise

The chart displays monthly precipitation patterns in Surprise, 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 Surprise, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec293935123412921222623
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Surprise

In Surprise in December humidity is 82%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and sweat-inducing, which can be quite uncomfortable for traveling.

December Average Humidity in Surprise

This chart illustrates the average monthly humidity levels in Surprise, 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 Surprise is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%79%67%55%40%33%34%48%64%67%77%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Surprise

In Surprise in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Surprise for better planning.

Maximum UV Index Levels in Surprise for December

The chart shows the monthly maximum UV Index (UVI) for Surprise 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 Surprise typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112111110754
Data source: Surprise 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 Surprise Compares to Other Months

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

This table compares monthly weather conditions in Surprise, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)29 mm (1.1 inches)76%moderate
February Weather13°C (56°F)39 mm (1.5 inches)79%high
March Weather17°C (63°F)35 mm (1.4 inches)67%very high
April Weather23°C (73°F)1 mm (0.1 inches)55%very high
May Weather26°C (80°F)2 mm (0.1 inches)40%extreme
June Weather32°C (91°F)3 mm (0.1 inches)33%extreme
July Weather34°C (93°F)41 mm (1.6 inches)34%extreme
August Weather34°C (93°F)29 mm (1.2 inches)48%extreme
September Weather30°C (87°F)21 mm (0.8 inches)64%very high
October Weather23°C (74°F)22 mm (0.9 inches)67%high
November Weather18°C (65°F)26 mm (1.0 inches)77%moderate
December Weather12°C (54°F)23 mm (0.9 inches)82%moderate

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