December Weather in McKinney

Last updated: March 2, 2024

The weather in McKinney, United States, during December is characterized by an average temperature of 10°C (51°F). Highs can soar to 24°C (76°F), while lows may dip to -3°C (27°F). Typically, the humidity level in McKinney throughout December hovers around 87%.

-3°C (27°F)

Minimum temperature

10°C (51°F)

Average temperature

24°C (76°F)

Maximum temperature

87%

Humidity

Precipitation and Sunshine hours

In December, McKinney averages 73 mm (2.9 inches) of rainfall, typically over the course of 8 rainy days. The month enjoys an average of 9 hours 58 minutes of daylight, with the sun shining for approximately 7 hours 11 minutes each day. Additionally, there is a 45% probability of sunny days during this period.

73 mm (2.9 inches)

Precipitation

8 rainy days

Rainy days

7 hours 11 minutes

Sunshine hours

45%

Chance of sun

UV Index

In December, the UV Index in McKinney reaches a maximum of 4, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 4 4 3 2 1 1 0 0
Exposure Low Moderate Low
Time to burn 45 min 30 min 45 min

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