December weather forecastOshawa, Canada
December
Weather in December
December holds the reins of winter firmly, with biting cold temperatures, often falling to -3.6°C (25.5°F). A beautiful layer of snow covering the city makes the perfect setting for Christmas celebrations. Despite the chilly weather, Oshawa remains lively, filled with holiday spirit. The promise of a whole new year lies ahead, as residents bundle up to brave the frosty conditions.Temperature
December in Oshawa involves a decrease in temperature, down from a frosty 6.1°C (43°F) in November to a cold 0.5°C (32.9°F). Oshawa marks an average drop to a freezing cold -3.6°C (25.5°F) during nighttime in December, following the high of the day.Humidity
In December, the average relative humidity in Oshawa is 84%.Rainfall
In Oshawa, during December, the rain falls for 9.8 days and regularly aggregates up to 44mm (1.73") of precipitation. In Oshawa, during the entire year, the rain falls for 158.8 days and collects up to 693mm (27.28") of precipitation.Snowfall
Months with snowfall in Oshawa are January through April, November and December. In Oshawa, in December, snow falls for 9.1 days, with typically accumulated 65mm (2.56") of snow. Throughout the year, in Oshawa, there are 51.4 snowfall days, and 383mm (15.08") of snow is accumulated.Sea temperature
In December, the average sea temperature is 5.2°C (41.4°F).Note: Dipping in 5.2°C (41.4°F) at temperatures less than 10°C (50°F) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:30 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 4:47 pm EST.
Sunshine
The average sunshine in December is 3.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Oshawa, Canada
- Average high temperature in December: 0.5°C
The warmest month (with the highest average high temperature) is July (24.4°C).
The month with the lowest average high temperature is January (-2.9°C).
- Average low temperature in December: -3.6°C
The month with the highest average low temperature is August (16.8°C).
The coldest month (with the lowest average low temperature) is January (-8.3°C).
Average pressure in December
Oshawa, Canada
- Average pressure in December: 1017.3mbar
The month with the highest atmospheric pressure is March (1018.3mbar).
The month with the lowest atmospheric pressure is June (1013mbar).
Average wind speed in December
Oshawa, Canada
- Average wind speed in December: 17.9km/h
The windiest month (with the highest average wind speed) is January (18.7km/h).
The calmest month (with the lowest average wind speed) is July (11.4km/h).
Average humidity in December
Oshawa, Canada
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Oshawa, Canada
- Average rainfall in December: 44mm
The wettest month (with the highest rainfall) is August (73mm).
The driest months (with the least rainfall) are February and November (43mm).
Average rainfall days in December
Oshawa, Canada
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (7.3 days).
Average snowfall in December
Oshawa, Canada
- Average snowfall in December: 65mm
The month with the highest snowfall is February (110mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Oshawa, Canada
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Oshawa, Canada
- Average sea temperature in December: 5.2°C
The best month for swimming (with the highest average sea temperature) is August (22.4°C).
The coldest month (with the lowest average sea temperature) is March (2.3°C).
Average daylight in December /
Average sunshine in December
Oshawa, 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: 3h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Oshawa, Canada
- Average sunshine days in December: 13.3 days
The month with the most sunshine days is November (14.9 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in December
Oshawa, Canada
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Oshawa, Canada
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Oshawa, Canada
- Average visibility in December: 9km
The months with the highest visibility are August and September (10km).
The month with the lowest visibility is January (8km).
