December weather forecastStephenville, Canada
December
Weather in December
December, the first month of the winter in Stephenville, is also an icy month, with an average temperature ranging between min -3.5°C (25.7°F) and max 0.3°C (32.5°F).Temperature
The start of December comes with a small reduction in the average high-temperature, subtly receding from an icy 5.2°C (41.4°F) in November to a still cold 0.3°C (32.5°F). In Stephenville, nights during December observe an average temperature decrease to a freezing cold -3.5°C (25.7°F).Humidity
The average relative humidity in December in Stephenville is 83%.Rainfall
In December, the rain falls for 6.9 days. Throughout December, 55mm (2.17") of precipitation is accumulated. Throughout the year, there are 126.7 rainfall days, and 629mm (24.76") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 10.3 days. Throughout December, 108mm (4.25") of snow is accumulated. Throughout the year, in Stephenville, there are 61.4 snowfall days, and 600mm (23.62") of snow is accumulated.Sea temperature
In December, the average sea temperature is 2.7°C (36.9°F).Note: In the water-based sport of swimming, this state is life-threatening and exceedingly dangerous. The freezing water causes severe discomfort, leading to rapid hyperventilation. A specialized swimsuit is compulsory to avert thermal damage.
Daylight
The month with the shortest days is December, with an average of 8h and 24min of daylight.On the first day of December in Stephenville, Canada, sunrise is at 7:55 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 8:16 am and sunset at 4:38 pm NST.
Sunshine
In December, the average sunshine in Stephenville is 2.3h.UV index
January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Stephenville, Canada
- Average high temperature in December: 0.3°C
The warmest month (with the highest average high temperature) is August (19.9°C).
The month with the lowest average high temperature is February (-3.1°C).
- Average low temperature in December: -3.5°C
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is February (-8.8°C).
Average pressure in December
Stephenville, Canada
- Average pressure in December: 1011.2mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is January (1008.6mbar).
Average wind speed in December
Stephenville, Canada
- Average wind speed in December: 23.9km/h
The windiest month (with the highest average wind speed) is January (24.8km/h).
The calmest month (with the lowest average wind speed) is July (14.9km/h).
Average humidity in December
Stephenville, Canada
- Average humidity in December: 83%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (80%).
Average rainfall in December
Stephenville, Canada
- Average rainfall in December: 55mm
The wettest month (with the highest rainfall) is November (67mm).
The driest month (with the least rainfall) is March (41mm).
Average rainfall days in December
Stephenville, Canada
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in December
Stephenville, Canada
- Average snowfall in December: 108mm
The month with the highest snowfall is February (143mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Stephenville, Canada
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Stephenville, Canada
- Average sea temperature in December: 2.7°C
The best month for swimming (with the highest average sea temperature) is August (15.5°C).
The coldest month (with the lowest average sea temperature) is March (-0.3°C).
Average daylight in December /
Average sunshine in December
Stephenville, Canada
- Average daylight in December: 8h and 24min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 2h and 18min
The month with the most sunshine is August (Average sunshine: 8h and 42min).
The month with the least sunshine is January (Average sunshine: 1h and 36min).
Average sunshine days in December
Stephenville, Canada
- Average sunshine days in December: 11.2 days
The month with the most sunshine days is June (16.1 days).
The month with the least sunshine days is February (9 days).
Average UV index in December
Stephenville, Canada
- Average UV index in December: 1
The month with the highest UV index is July (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
Stephenville, Canada
- Average cloud cover in December: 77
The month with the most cloud cover is January (Cloud cover 84).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in December
Stephenville, Canada
- Average visibility in December: 8km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January, February and December (8km).
