Climate and monthly weather forecast
Weather in January
In Greater Napanee, Canada, in January, the average water temperature is 3.3°C (37.9°F). Note: During swimming, this state is an instant threat to life. Weather in January »
Weather in February
In February, the average sea temperature in Greater Napanee, Canada, is 2.8°C (37°F). Note: In swimming, this scenario poses immediate life-threatening danger. Weather in February »
Weather in March
March is the month with the coldest seawater in Greater Napanee, Canada, with an average sea temperature of 1.9°C (35.4°F). Note: In the sport of swimming, this scenario is extremely cold, treacherous, and fatal. Weather in March »
Weather in April
In Greater Napanee, Canada, in April, the average water temperature is 3.4°C (38.1°F). Note: In the scenario of swimming, this is assessed as life-threatening and highly risky. Weather in April »
Weather in May
In Greater Napanee, Canada, the average seawater temperature in May is 5.5°C (41.9°F). Note: Swimming in 5.5°C (41.9°F) at temperatures under 10°C (50°F) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Weather in May »
Weather in June
In Greater Napanee, Canada, the average seawater temperature in June is 14.5°C (58.1°F). Note: Engaging in a swim in 14.5°C (58.1°F) can threaten life. Weather in June »
Weather in July
In Greater Napanee, Canada, in July, the average water temperature is 20.8°C (69.4°F). Note: The majority of individuals do not enjoy swimming in water that is 20.8°C (69.4°F). Weather in July »
Weather in August
With an average sea temperature of 22.3°C (72.1°F), August is the month with the warmest seawater in Greater Napanee, Canada. Note: When considering a person's aversion to cold, factors like sunshine, wind, and atmospheric temperature are key. Weather in August »
Weather in September
In Greater Napanee, Canada, in September, the average water temperature is 19.8°C (67.6°F). Note: Swimming is not an enjoyable activity for the majority when the water is at 19.8°C (67.6°F). Weather in September »
Weather in October
In October, the average sea temperature in Greater Napanee, Canada, is 14.2°C (57.6°F). Note: Caution: 14.2°C (57.6°F) temperatures below 10°C (50°F) during swimming can result in intense cold shock and quickened breathing. Weather in October »
Weather in November
In Greater Napanee, Canada, in November, the average water temperature is 9.3°C (48.7°F). Note: Swimming in 9.3°C (48.7°F) can be lethal. Merely spending a few minutes in 13°C (55.4°F) waters feels harsh, and venturing below 10°C (50°F) might disrupt breathing control and bring about cold shock, contingent on individual resilience. Weather in November »
Weather in December
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). Weather in December »
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
When is the sea coldest?
The month with the coldest seawater is March, with an average sea temperature of 1.9°C (35.4°F).
When is Daylight Saving Time (DST) in Greater Napanee?
On Sunday, 10. March 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends on Sunday, 03. November 2024, at 2:00 am, and the time zone reverts from EDT to EST.
When are the longest days?
June has the longest days of the year, with an average of 15h and 30min of daylight.
What is the month with the warmest sea water?
August is the month with the warmest seawater, with an average sea temperature of 22.3°C (72.1°F).
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.
Average sea temperature
Greater Napanee, Canada
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
Greater Napanee, Canada
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 3min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - 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).
