December Weather in Waterloo

Last updated: March 2, 2024

The weather in Waterloo, United States, during December is characterized by an average temperature of 0°C (32°F). Highs can soar to 16°C (61°F), while lows may dip to -16°C (4°F). Typically, the humidity level in Waterloo throughout December hovers around 83%.

-16°C (4°F)

Minimum temperature

0°C (32°F)

Average temperature

16°C (61°F)

Maximum temperature

83%

Humidity

Precipitation and Sunshine hours

In December, Waterloo averages 40 mm (1.6 inches) of rainfall, typically over the course of 4 rainy days. The month enjoys an average of 9 hours 14 minutes of daylight, with the sun shining for approximately 7 hours 5 minutes each day. Additionally, there is a 58% probability of sunny days during this period.

40 mm (1.6 inches)

Precipitation

4 rainy days

Rainy days

7 hours 5 minutes

Sunshine hours

58%

Chance of sun

UV Index

In December, the UV Index in Waterloo reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 10:00 and 12:00, 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	2	2	2	2	2	1	1	0	0	0
Exposure	Low
Time to burn	45 min