December Weather in Lewiston

Last updated: March 2, 2024

The weather in Lewiston, United States, during December is characterized by an average temperature of 4°C (39°F). Highs can soar to 15°C (60°F), while lows may dip to -4°C (25°F). Typically, the humidity level in Lewiston throughout December hovers around 86%.

-4°C (25°F)

Minimum temperature

4°C (39°F)

Average temperature

15°C (60°F)

Maximum temperature

86%

Humidity

Precipitation and Sunshine hours

In December, Lewiston averages 118 mm (4.6 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 9 hours 17 minutes of daylight, with the sun shining for approximately 5 hours 16 minutes each day. Additionally, there is a 34% probability of sunny days during this period.

118 mm (4.6 inches)

Precipitation

11 rainy days

Rainy days

5 hours 16 minutes

Sunshine hours

34%

Chance of sun

UV Index

In December, the UV Index in Lewiston 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