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 December arrives, Chalk River's weather displays a decrease in high-temperatures, transitioning from November's icy 3.8°C (38.8°F) to a subzero cold -3.5°C (25.7°F). The average nighttime temperature in Chalk River, Canada, lowers to -9°C (15.8°F) throughout December.Humidity
In December, the average relative humidity in Chalk River is 87%.Rainfall
In Chalk River, in December, it is raining for 6.3 days, with typically 43mm (1.69") of accumulated precipitation. Throughout the year, in Chalk River, Canada, there are 126 rainfall days, and 575mm (22.64") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Chalk River, in December, snow falls for 16.3 days, with typically accumulated 172mm (6.77") of snow. Throughout the year, there are 81.7 snowfall days, and 1025mm (40.35") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:32 am and sunset at 4:26 pm. On the last day of December, in Chalk River, sunrise is at 7:51 am and sunset at 4:34 pm EST.
Sunshine
The average sunshine in December in Chalk River is 2.7h.UV index
The months with the lowest UV index in Chalk River are January through March, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is December in Chalk River?
What is the average humidity in December in Chalk River?
How many days does it rain in December in Chalk River?
How many days does it snow in December in Chalk River?
What is the month with the shortest days in Chalk River?
What is the average length of the day in December in Chalk River?
What time are sunrise and sunset in December in Chalk River?
How many hours of sunshine does Chalk River have in December?
What is the month with the lowest UV index in Chalk River?
What is the UV index intensity in December in Chalk River?
Average temperature in December
Chalk River, Canada
- Average high temperature in December: -3.5°C
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-6.8°C).
- Average low temperature in December: -9°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is January (-15.1°C).
Average pressure in December
Chalk River, Canada
- Average pressure in December: 1017.2mbar
The month with the highest atmospheric pressure is March (1018.3mbar).
The month with the lowest atmospheric pressure is June (1012.5mbar).
Average wind speed in December
Chalk River, Canada
- Average wind speed in December: 10.6km/h
The windiest month (with the highest average wind speed) is April (12km/h).
The calmest month (with the lowest average wind speed) is August (9.1km/h).
Average humidity in December
Chalk River, Canada
- Average humidity in December: 87%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (69%).
Average rainfall in December
Chalk River, Canada
- Average rainfall in December: 43mm
The wettest month (with the highest rainfall) is April (68mm).
The driest month (with the least rainfall) is November (37mm).
Average rainfall days in December
Chalk River, Canada
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in December
Chalk River, Canada
- Average snowfall in December: 172mm
The month with the highest snowfall is January (239mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Chalk River, Canada
- Average snowfall days in December: 16.3 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Chalk River, Canada
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 1h and 54min).
Average sunshine days in December
Chalk River, Canada
- Average sunshine days in December: 12.4 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in December
Chalk River, Canada
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in December
Chalk River, Canada
- Average cloud cover in December: 72
The months with the most cloud cover are January and February (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Chalk River, Canada
- Average visibility in December: 7km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January and February (6km).
Chalk River, Canada
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