December Weather in Sylva

Last updated: March 2, 2024

The weather in Sylva, United States, during December is characterized by an average temperature of 5°C (41°F). Highs can soar to 18°C (65°F), while lows may dip to -9°C (17°F). Typically, the humidity level in Sylva throughout December hovers around 88%.

-9°C (17°F)

Minimum temperature

5°C (41°F)

Average temperature

18°C (65°F)

Maximum temperature

88%

Humidity

Precipitation and Sunshine hours

In December, Sylva averages 143 mm (5.6 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 9 hours 48 minutes of daylight, with the sun shining for approximately 6 hours 5 minutes each day. Additionally, there is a 38% probability of sunny days during this period.

143 mm (5.6 inches)

Precipitation

11 rainy days

Rainy days

6 hours 5 minutes

Sunshine hours

38%

Chance of sun

UV Index

In December, the UV Index in Sylva 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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