December Weather in Union City

Last updated: March 2, 2024

The weather in Union City, United States, during December is characterized by an average temperature of 10°C (51°F). Highs can soar to 20°C (68°F), while lows may dip to 3°C (37°F). Typically, the humidity level in Union City throughout December hovers around 80%.

3°C (37°F)

Minimum temperature

10°C (51°F)

Average temperature

20°C (68°F)

Maximum temperature

80%

Humidity

Precipitation and Sunshine hours

In December, Union City averages 81 mm (3.2 inches) of rainfall, typically over the course of 9 rainy days. The month enjoys an average of 9 hours 36 minutes of daylight, with the sun shining for approximately 6 hours 26 minutes each day. Additionally, there is a 35% probability of sunny days during this period.

81 mm (3.2 inches)

Precipitation

9 rainy days

Rainy days

6 hours 26 minutes

Sunshine hours

35%

Chance of sun

UV Index

In December, the UV Index in Union City reaches a maximum of 3, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 30 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 0 1 1 2 3 3 3 2 1 1 0 0 0
Exposure Low Moderate Low
Time to burn 45 min 30 min 45 min

Compare Union City's Climate with Cities Worldwide