December Weather in Lewistown

Last updated: March 2, 2024

The weather in Lewistown, United States, during December is characterized by an average temperature of 2°C (36°F). Highs can soar to 19°C (66°F), while lows may dip to -12°C (10°F). Typically, the humidity level in Lewistown throughout December hovers around 86%.

-12°C (10°F)

Minimum temperature

2°C (36°F)

Average temperature

19°C (66°F)

Maximum temperature

86%

Humidity

Precipitation and Sunshine hours

In December, Lewistown averages 41 mm (1.6 inches) of rainfall, typically over the course of 5 rainy days. The month enjoys an average of 9 hours 21 minutes of daylight, with the sun shining for approximately 6 hours 40 minutes each day. Additionally, there is a 48% probability of sunny days during this period.

41 mm (1.6 inches)

Precipitation

5 rainy days

Rainy days

6 hours 40 minutes

Sunshine hours

48%

Chance of sun

UV Index

In December, the UV Index in Lewistown reaches a maximum of 3, 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 2 3 2 2 1 1 0 0 0
Exposure Low Moderate Low
Time to burn 45 min 30 min 45 min

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