December weather forecastSaint-Hyacinthe, Canada
December
Weather in December
December, the first month of the winter in Saint-Hyacinthe, is still a freezing cold month, with an average temperature varying between -2.5°C (27.5°F) and -7.8°C (18°F).Temperature
As Saint-Hyacinthe enters December, the average high-temperature decreases from the a cold 4.7°C (40.5°F) of November to a subzero cold -2.5°C (27.5°F). During December, the temperature tends to dip to an average of -7.8°C (18°F) at night.Humidity
In December, the average relative humidity in Saint-Hyacinthe, Canada, is 87%.Rainfall
In Saint-Hyacinthe, during December, the rain falls for 9.5 days and regularly aggregates up to 70mm (2.76") of precipitation. In Saint-Hyacinthe, during the entire year, the rain falls for 162.5 days and collects up to 852mm (33.54") of precipitation.Snowfall
January through May, October through December are months with snowfall in Saint-Hyacinthe, Canada. In December, it is snowing for 15 days. Throughout December, 221mm (8.7") of snow is accumulated. Throughout the year, in Saint-Hyacinthe, there are 81.6 snowfall days, and 1190mm (46.85") of snow is accumulated.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year in Saint-Hyacinthe.On the first day of the month, sunrise is at 7:12 am and sunset at 4:09 pm. On the last day of December, in Saint-Hyacinthe, sunrise is at 7:32 am and sunset at 4:18 pm EST.
Sunshine
In December, the average sunshine in Saint-Hyacinthe 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 reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 1 during December translates into the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint-Hyacinthe, Canada
- Average high temperature in December: -2.5°C
The warmest month (with the highest average high temperature) is July (25.2°C).
The month with the lowest average high temperature is January (-5.9°C).
- Average low temperature in December: -7.8°C
The month with the highest average low temperature is July (15°C).
The coldest month (with the lowest average low temperature) is January (-13.1°C).
Average pressure in December
Saint-Hyacinthe, Canada
- Average pressure in December: 1017.2mbar
The month with the highest atmospheric pressure is November (1017.7mbar).
The month with the lowest atmospheric pressure is June (1012.4mbar).
Average wind speed in December
Saint-Hyacinthe, Canada
- Average wind speed in December: 11.7km/h
The windiest month (with the highest average wind speed) is April (13.3km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).
Average humidity in December
Saint-Hyacinthe, Canada
- Average humidity in December: 87%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is May (75%).
Average rainfall in December
Saint-Hyacinthe, Canada
- Average rainfall in December: 70mm
The wettest months (with the highest rainfall) are May and August (82mm).
The driest month (with the least rainfall) is September (54mm).
Average rainfall days in December
Saint-Hyacinthe, Canada
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in December
Saint-Hyacinthe, Canada
- Average snowfall in December: 221mm
The month with the highest snowfall is February (298mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Saint-Hyacinthe, Canada
- Average snowfall days in December: 15 days
The month with the highest number of snowfall days is February (19.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint-Hyacinthe, Canada
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 3h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in December
Saint-Hyacinthe, Canada
- Average sunshine days in December: 11.3 days
The month with the most sunshine days is September (15.2 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in December
Saint-Hyacinthe, 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 and December (UV index 1).
Average cloud cover in December
Saint-Hyacinthe, Canada
- Average cloud cover in December: 66
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Saint-Hyacinthe, Canada
- Average visibility in December: 7km
The months with the highest visibility are April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, February, March and December (7km).
