Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The onset of December entails a temperature shift, as the average high-temperature decreases from a chilly 6.8°C (44.2°F) in November to a cold 1.2°C (34.2°F). A mean low-temperature of -3.6°C (25.5°F) is a distinguishing feature of December, indicating a slight dip from daytime highs.Humidity
In Port Rowan, the average relative humidity in December is 84%.Rainfall
In Port Rowan, in December, it is raining for 10.8 days, with typically 46mm (1.81") of accumulated precipitation. Throughout the year, there are 163.9 rainfall days, and 672mm (26.46") of precipitation is accumulated.Snowfall
Months with snowfall in Port Rowan are January through May, October through December. In Port Rowan, in December, during 13.9 snowfall days, 89mm (3.5") of snow is typically accumulated. Throughout the year, in Port Rowan, there are 65.3 snowfall days, and 495mm (19.49") of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:32 am and sunset at 4:49 pm. On the last day of December, in Port Rowan, sunrise is at 7:51 am and sunset at 4:58 pm EST.
Sunshine
The average sunshine in December in Port Rowan is 3.2h.UV index
The months with the lowest UV index in Port Rowan are January, February and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Port Rowan?
What is the average humidity in December in Port Rowan?
How many days does it rain in December in Port Rowan?
How much does it snow in Port Rowan in December?
What is the month with the shortest days in Port Rowan?
What is the average length of the day in December in Port Rowan?
What time are sunrise and sunset in December in Port Rowan?
How long on average sun shines in December in Port Rowan?
When is the lowest UV index in Port Rowan?
What is the UV index reading in December in Port Rowan?
Average temperature in December
Port Rowan, Canada
- Average high temperature in December: 1.2°C
The warmest month (with the highest average high temperature) is July (25.6°C).
The month with the lowest average high temperature is January (-2.7°C).
- Average low temperature in December: -3.6°C
The month with the highest average low temperature is July (15.9°C).
The coldest month (with the lowest average low temperature) is January (-8.1°C).
Average pressure in December
Port Rowan, Canada
- Average pressure in December: 1017.7mbar
The month with the highest atmospheric pressure is March (1018.6mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).
Average wind speed in December
Port Rowan, Canada
- Average wind speed in December: 16.7km/h
The windiest month (with the highest average wind speed) is January (18km/h).
The calmest month (with the lowest average wind speed) is July (10.9km/h).
Average humidity in December
Port Rowan, Canada
- Average humidity in December: 84%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in December
Port Rowan, Canada
- Average rainfall in December: 46mm
The wettest month (with the highest rainfall) is July (74mm).
The driest month (with the least rainfall) is September (39mm).
Average rainfall days in December
Port Rowan, Canada
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in December
Port Rowan, Canada
- Average snowfall in December: 89mm
The month with the highest snowfall is February (155mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Port Rowan, Canada
- Average snowfall days in December: 13.9 days
The month with the highest number of snowfall days is January (15.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Port Rowan, Canada
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Port Rowan, Canada
- Average sunshine days in December: 9.9 days
The month with the most sunshine days is September (13.6 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in December
Port Rowan, 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, February and December (UV index 1).
Average cloud cover in December
Port Rowan, Canada
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Port Rowan, 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).
Port Rowan, Canada
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