Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
As Waterloo enters December, the average high-temperature decreases from the a wintry 5.8°C (42.4°F) of November to a freezing cold -0.2°C (31.6°F). Recording a slight decline in temperature during the nights, Waterloo's December temperatures average at a still subzero cold -4.6°C (23.7°F).Humidity
In Waterloo, the average relative humidity in December is 87%.Rainfall
In Waterloo, Canada, in December, during 8.8 rainfall days, 50mm (1.97") of precipitation is typically accumulated. Throughout the year, there are 157.6 rainfall days, and 681mm (26.81") of precipitation is accumulated.Snowfall
Months with snowfall in Waterloo are January through May, October through December. In Waterloo, in December, snow falls for 17.3 days, with typically accumulated 122mm (4.8") of snow. Throughout the year, in Waterloo, there are 80.1 snowfall days, and 666mm (26.22") of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of December in Waterloo, sunrise is at 7:35 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 4:55 pm EST.
Sunshine
In Waterloo, the average sunshine in December is 2.6h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Waterloo. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 1 in December translates into this advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is it in Waterloo in December?
What is the average humidity in December in Waterloo?
How many days does it rain in December in Waterloo?
How many days does it snow in December in Waterloo?
What is the month with the shortest days in Waterloo?
How many hours of daylight does Waterloo have in December?
When are sunrise and sunset in December in Waterloo?
How long on average sun shines in December in Waterloo?
What is the month with the lowest UV index in Waterloo?
How high is the UV index in December in Waterloo?
Average temperature in December
Waterloo, Canada
- Average high temperature in December: -0.2°C
The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (-3.7°C).
- Average low temperature in December: -4.6°C
The month with the highest average low temperature is July (15°C).
The coldest month (with the lowest average low temperature) is January (-9.3°C).
Average pressure in December
Waterloo, Canada
- Average pressure in December: 1017.5mbar
The month with the highest atmospheric pressure is March (1018.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).
Average wind speed in December
Waterloo, Canada
- Average wind speed in December: 17.2km/h
The windiest month (with the highest average wind speed) is January (18.1km/h).
The calmest month (with the lowest average wind speed) is July (11km/h).
Average humidity in December
Waterloo, Canada
- Average humidity in December: 87%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Waterloo, Canada
- Average rainfall in December: 50mm
The wettest month (with the highest rainfall) is October (71mm).
The driest month (with the least rainfall) is September (37mm).
Average rainfall days in December
Waterloo, Canada
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in December
Waterloo, Canada
- Average snowfall in December: 122mm
The month with the highest snowfall is February (164mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Waterloo, Canada
- Average snowfall days in December: 17.3 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Waterloo, Canada
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Waterloo, Canada
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is September (13.9 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in December
Waterloo, Canada
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Waterloo, Canada
- Average cloud cover in December: 73
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Waterloo, Canada
- Average visibility in December: 8km
The months with the highest visibility are April, May, June, July and October (9km).
The month with the lowest visibility is January (7km).
Waterloo, Canada
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