December weather forecastAjax, Canada
December
Weather in December
The first month of the winter, December, is also an icy month in Ajax, Canada, with an average temperature fluctuating between -3.7°C (25.3°F) and 0.5°C (32.9°F).Temperature
Ajax's December weather shows a moderate shift in high-temperatures, falling from November's frosty 6.3°C (43.3°F) to an icy 0.5°C (32.9°F). December nighttime temperatures in Ajax, Canada, hover close to the daytime peak with an average of -3.7°C (25.3°F).Humidity
In December, the average relative humidity is 84%.Rainfall
In Ajax, in December, during 9.5 rainfall days, 43mm (1.69") of precipitation is typically accumulated. Throughout the year, there are 151.8 rainfall days, and 663mm (26.1") of precipitation is accumulated.Snowfall
Months with snowfall in Ajax are January through April, November and December. In Ajax, in December, during 9.6 snowfall days, 58mm (2.28") of snow is typically accumulated. In Ajax, Canada, during the entire year, snow falls for 48.2 days and aggregates up to 348mm (13.7") of snow.Daylight
December has the shortest days of the year in Ajax, 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 7:50 am and sunset at 4:48 pm EST.
Sunshine
In Ajax, 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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 1 in December translates into these instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ajax, Canada
- Average high temperature in December: 0.5°C
The warmest month (with the highest average high temperature) is July (24.3°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in December: -3.7°C
The months with the highest average low temperature are July and August (16.8°C).
The coldest month (with the lowest average low temperature) is January (-8.3°C).
Average pressure in December
Ajax, 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
Ajax, Canada
- Average wind speed in December: 17.8km/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
Ajax, 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
Ajax, Canada
- Average rainfall in December: 43mm
The wettest month (with the highest rainfall) is August (74mm).
The driest month (with the least rainfall) is November (38mm).
Average rainfall days in December
Ajax, Canada
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in December
Ajax, Canada
- Average snowfall in December: 58mm
The month with the highest snowfall is February (106mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Ajax, Canada
- Average snowfall days in December: 9.6 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Ajax, 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: 2h and 54min).
Average sunshine days in December
Ajax, Canada
- Average sunshine days in December: 14 days
The month with the most sunshine days is November (15.1 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in December
Ajax, 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
Ajax, Canada
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Ajax, Canada
- Average visibility in December: 9km
The months with the highest visibility are August and September (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, October, November and December (9km).
