December Weather in Mill Creek

Last updated: March 2, 2024

The weather in Mill Creek, United States, during December is characterized by an average temperature of 6°C (42°F). Highs can soar to 12°C (54°F), while lows may dip to -2°C (29°F). Typically, the humidity level in Mill Creek throughout December hovers around 88%.

-2°C (29°F)

Minimum temperature

6°C (42°F)

Average temperature

12°C (54°F)

Maximum temperature

88%

Humidity

Precipitation and Sunshine hours

In December, Mill Creek averages 199 mm (7.8 inches) of rainfall, typically over the course of 18 rainy days. The month enjoys an average of 8 hours 26 minutes of daylight, with the sun shining for approximately 2 hours 59 minutes each day. Additionally, there is a 13% probability of sunny days during this period.

199 mm (7.8 inches)

Precipitation

18 rainy days

Rainy days

2 hours 59 minutes

Sunshine hours

13%

Chance of sun

UV Index

In December, the UV Index in Mill Creek reaches a maximum of 1, indicating a level of Low exposure. The most intense UV radiation typically occurs between 08:00 and 10:00, during which unprotected skin may burn in as little as 45 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 1 1 1 1 1 1 1 0 0 0
Exposure Low
Time to burn 45 min

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