Weather in September
Sea temperature
In Greater Napanee, Canada, the average seawater temperature in September is 19.8°C (67.6°F).Note: Swimming in 19.8°C (67.6°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).
Daylight
The average length of the day in September in Greater Napanee is 12h and 30min.On the first day of September, sunrise is at 6:31 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:49 pm EDT.
Updated: Jul 14, 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 September?
In Greater Napanee, in September, the average water temperature is 19.8°C (67.6°F). For swimming, a surface water temperature of 19.8°C (67.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
What is the average length of the day in September in Greater Napanee?
In Greater Napanee, the average day length in September is 12h and 30min.
When is the sunrise / sunset in September?
In September, on the first day of the month, sunrise is at 6:31 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:49 pm EDT.
Average sea temperature in September
Greater Napanee, Canada
- Average sea temperature in September: 19.8°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 September
Greater Napanee, Canada
- Average daylight in September: 12h and 3min
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).
Greater Napanee, Canada
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location