nomadseason

December Weather in Tempe, United States

Last updated: June 24, 2025

In December, the average temperature in Tempe, United States hovers around 13°C (55°F), with cool nights dipping to a chilly 0°C (32°F) and occasional warm days peaking at a pleasant 28°C (83°F). Be prepared for some rainy spells, as 23 mm (0.9 in) of precipitation may grace the area over 4 days. The humidity is notably high, averaging 82%, so expect a comfortable yet slightly sticky atmosphere during your stay!

December Temperature in Tempe

In December in Tempe, the average temperature is 13°C (55°F). The maximum can reach 28°C (83°F), while the minimum can drop as low as 0°C (32°F). This range of temperatures makes it advisable for travelers to pack layers to comfortably enjoy both warm and cooler moments during their visit.

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

The chart illustrates December temperature patterns in Tempe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tempe, December typically has an average temperature of 13°C (55°F), with highs reaching up to 28°C (83°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec545764758292959489756555
Data source: Temperature data for Tempe generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Tempe

In Tempe in December, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.

December Precipitation Trends in Tempe

The chart displays monthly precipitation patterns in Tempe, 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 Tempe, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec253729122373927262123
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Tempe

In Tempe in December, humidity is 82%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.

December Average Humidity in Tempe

This chart illustrates the average monthly humidity levels in Tempe, 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 Tempe 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 Tempe

In Tempe 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 Tempe for better planning.

Maximum UV Index Levels in Tempe for December

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

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

This table compares monthly weather conditions in Tempe, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)25 mm (1.0 inches)76%moderate
February Weather14°C (57°F)37 mm (1.4 inches)79%high
March Weather18°C (65°F)29 mm (1.2 inches)67%very high
April Weather24°C (75°F)1 mm (0.1 inches)55%very high
May Weather28°C (82°F)2 mm (0.1 inches)40%extreme
June Weather34°C (93°F)2 mm (0.1 inches)33%extreme
July Weather35°C (95°F)37 mm (1.4 inches)34%extreme
August Weather35°C (95°F)39 mm (1.5 inches)48%extreme
September Weather32°C (89°F)27 mm (1.1 inches)64%very high
October Weather24°C (76°F)26 mm (1.0 inches)67%high
November Weather18°C (66°F)21 mm (0.8 inches)77%moderate
December Weather13°C (55°F)23 mm (0.9 inches)82%moderate

Compare Tempe's Climate with Cities Worldwide