September weather forecastStephenville Crossing, Canada

September

Weather in September

The first month of the autumn, September, is still a mild month in Stephenville Crossing, Canada, with an average temperature varying between 10.3°C (50.5°F) and 15.5°C (59.9°F).

Temperature

A mild shift in the average high-temperature occurs in September, reducing from a refreshing 19.9°C (67.8°F) in August to a mild 15.5°C (59.9°F). Stephenville Crossing's temperature lowers to a mean of 10.3°C (50.5°F) during the nights in September.

Humidity

The average relative humidity in September in Stephenville Crossing is 81%.

Rainfall

In Stephenville Crossing, in September, during 14 rainfall days, 52mm (2.05") of precipitation is typically accumulated. In Stephenville Crossing, during the entire year, the rain falls for 126.7 days and collects up to 629mm (24.76") of precipitation.

Snowfall

In Stephenville Crossing, Canada, snow does not fall in June through September.

Sea temperature

In Stephenville Crossing, the average seawater temperature in September is 12.8°C (55°F).
Note: Dipping into 12.8°C (55°F) below 10°C (50°F) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 13°C (55.4°F) can be jarring.

Daylight

In Stephenville Crossing, the average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 6:42 am and sunset at 8:05 pm. On the last day of September, in Stephenville Crossing, sunrise is at 7:22 am and sunset at 7:04 pm NDT.

Sunshine

The average sunshine in September in Stephenville Crossing is 7.2h.

UV index

The average daily maximum UV index in September in Stephenville Crossing, Canada, is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 3 during September translates into these guidelines:
Exercise prevention - Warding off sunburn is urged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.

Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In September, the average high-temperature and low-temperature in Stephenville Crossing are 15.5°C (59.9°F) and 10.3°C (50.5°F) respectively.

In Stephenville Crossing, Canada, the average relative humidity in September is 81%.

In September, in Stephenville Crossing, the rain falls for 14 days. Throughout September, 52mm (2.05") of precipitation is accumulated.

In Stephenville Crossing, snow does not fall in June through September.

In Stephenville Crossing, in September, it doesn't snow. In October, it regularly snows.

In Stephenville Crossing, Canada, in September, the average water temperature is 12.8°C (55°F). Swimming in 12.8°C (55°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

In Stephenville Crossing, the average day length in September is 12h and 34min.

On the first day of September in Stephenville Crossing, Canada, sunrise is at 6:42 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:04 pm NDT.

The average sunshine duration in September in Stephenville Crossing, Canada, is 7.2h.

The average daily maximum UV index in September in Stephenville Crossing is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

19.9°C

15.5°C

9.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

16.8km/h

19.5km/h

21.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

14.6

14.4

14.9

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Stephenville Crossing, Canada

Average high temperature in September: 15.5°C

The warmest month (with the highest average high temperature) is August (19.9°C).
The month with the lowest average high temperature is February (-3.1°C).

Average low temperature in September: 10.3°C

The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is February (-8.8°C).

Average pressure in September
Stephenville Crossing, Canada

Average pressure in September: 1014.8mbar

The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is January (1008.6mbar).

Average wind speed in September
Stephenville Crossing, Canada

Average wind speed in September: 18.6km/h

The windiest month (with the highest average wind speed) is January (24.8km/h).
The calmest month (with the lowest average wind speed) is July (14.9km/h).

Average humidity in September
Stephenville Crossing, Canada

Average humidity in September: 81%

The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (80%).

Average rainfall in September
Stephenville Crossing, Canada

Average rainfall in September: 52mm

The wettest month (with the highest rainfall) is November (67mm).
The driest month (with the least rainfall) is March (41mm).

Average rainfall days in September
Stephenville Crossing, Canada

Average rainfall days in September: 14 days

The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is February (4.1 days).

Average snowfall in September
Stephenville Crossing, Canada

Average snowfall in September: 0mm

The month with the highest snowfall is February (143mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September
Stephenville Crossing, Canada

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in September
Stephenville Crossing, Canada

Average sea temperature in September: 12.8°C

The best month for swimming (with the highest average sea temperature) is August (15.3°C).
The coldest month (with the lowest average sea temperature) is March (-0.4°C).

Average daylight in September /
Average sunshine in September
Stephenville Crossing, Canada

Average daylight in September: 12h and 36min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

Average sunshine in September: 7h and 12min

The month with the most sunshine is August (Average sunshine: 8h and 42min).
The month with the least sunshine is January (Average sunshine: 1h and 36min).

Average sunshine days in September
Stephenville Crossing, Canada

Average sunshine days in September: 14.4 days

The month with the most sunshine days is June (16.1 days).
The month with the least sunshine days is February (9 days).

Average UV index in September
Stephenville Crossing, Canada

Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

Average cloud cover in September
Stephenville Crossing, Canada

Average cloud cover in September: 48

The month with the most cloud cover is January (Cloud cover 84).
The month with the least cloud cover is August (Cloud cover 42).

Average visibility in September
Stephenville Crossing, Canada

Average visibility in September: 9km

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).