December weather forecastChatham, Canada
December
Weather in December
December, the first month of the winter in Chatham, is also a wintry month, with an average temperature varying between -2.6°C (27.3°F) and 1.5°C (34.7°F).Temperature
The onset of December entails a temperature shift, as the average high-temperature decreases from a frosty 7.5°C (45.5°F) in November to a wintry 1.5°C (34.7°F). A mean low-temperature of -2.6°C (27.3°F) is anticipated during the month of December in Chatham, a slight step down from the daytime high.Humidity
In Chatham, the average relative humidity in December is 82%.Rainfall
In Chatham, during December, the rain falls for 9.5 days and regularly aggregates up to 37mm (1.46") of precipitation. In Chatham, during the entire year, the rain falls for 155.6 days and collects up to 650mm (25.59") of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Chatham, Canada, in December, during 12.5 snowfall days, 68mm (2.68") of snow is typically accumulated. In Chatham, during the entire year, snow falls for 57.1 days and aggregates up to 371mm (14.61") of snow.Daylight
December has the shortest days of the year in Chatham, with an average of 9h and 6min of daylight.On the first day of December in Chatham, sunrise is at 7:39 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 5:06 pm EST.
Sunshine
The average sunshine in December is 3.4h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In December, the UV index of 1 transforms 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. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Chatham, Canada
- Average high temperature in December: 1.5°C
The warmest month (with the highest average high temperature) is July (25.4°C).
The month with the lowest average high temperature is January (-1.9°C).
- Average low temperature in December: -2.6°C
The month with the highest average low temperature is July (17.4°C).
The coldest month (with the lowest average low temperature) is January (-7°C).
Average pressure in December
Chatham, Canada
- Average pressure in December: 1018.3mbar
The month with the highest atmospheric pressure is November (1018.9mbar).
The month with the lowest atmospheric pressure is June (1013.5mbar).
Average wind speed in December
Chatham, Canada
- Average wind speed in December: 17.3km/h
The windiest month (with the highest average wind speed) is January (17.6km/h).
The calmest month (with the lowest average wind speed) is July (11.1km/h).
Average humidity in December
Chatham, Canada
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, May and October (76%).
Average rainfall in December
Chatham, Canada
- Average rainfall in December: 37mm
The wettest month (with the highest rainfall) is May (76mm).
The driest months (with the least rainfall) are January and February (36mm).
Average rainfall days in December
Chatham, Canada
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in December
Chatham, Canada
- Average snowfall in December: 68mm
The month with the highest snowfall is February (108mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Chatham, Canada
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Chatham, Canada
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Chatham, Canada
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is September (14.6 days).
The month with the least sunshine days is January (10.2 days).
Average UV index in December
Chatham, Canada
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Chatham, Canada
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Chatham, Canada
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
