December
Weather in December
Sea temperature
In Greater Napanee, Canada, the average seawater temperature in December is 5.4°C (41.7°F).Note: In 5.4°C (41.7°F), cold shock and rapid breathing can occur when swimming at temperatures below 10°C (50°F).
Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:23 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:43 am and sunset at 4:39 pm EST.
Updated: Aug 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is the water in December?
In Greater Napanee, the average seawater temperature in December is 5.4°C (41.7°F). Swimming in 5.4°C (41.7°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 54min of daylight.
How many hours of daylight does Greater Napanee have in December?
In December, the average day length is 8h and 56min.
When are sunrise and sunset in December?
In December, on the first day of the month, sunrise is at 7:23 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 4:39 pm EST.
Average sea temperature in December
Greater Napanee, Canada
- Average sea temperature in December: 5.4°C
The best month for swimming (with the highest average sea temperature) is August (22.3°C).
The coldest month (with the lowest average sea temperature) is March (1.9°C).
Average daylight in December
Greater Napanee, Canada
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
