September weather forecast
Chemainus, Canada

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Weather in September

September, the first month of the autumn in Chemainus, is still a refreshing month, with an average temperature fluctuating between 9.6°C and 16.8°C.

Temperature

The average high-temperature shows a slight dip in September, from August's pleasant 20.4°C to a refreshing 16.8°C. In September, Chemainus experiences an average nighttime temperature of 9.6°C.

Humidity

The average relative humidity in September in Chemainus is 81%.

Rainfall

In Chemainus, in September, it is raining for 15.2 days, with typically 73mm of accumulated precipitation. In Chemainus, during the entire year, the rain falls for 201.4 days and collects up to 1213mm of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in September in Chemainus is 12h and 34min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:57 pm. On the last day of September, in Chemainus, Canada, sunrise is at 7:13 am and sunset at 6:56 pm PDT.

Sunshine

The average sunshine in September is 8.3h.

UV index

In Chemainus, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 3 suggests these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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FAQ

What is the average September temperature in Chemainus?

September temperatures in Chemainus vary between a high-temperature of 16.8°C and a low-temperature of 9.6°C.

What is the average humidity in September in Chemainus?

In Chemainus, the average relative humidity in September is 81%.

How many days does it rain in September in Chemainus?

In Chemainus, Canada, in September, it is raining for 15.2 days, with typically 73mm of accumulated precipitation.

When it does not snow in Chemainus?

May through October are months without snowfall.

What is the average length of the day in September in Chemainus?

The average day length in September in Chemainus is 12h and 34min.

When is the sunrise / sunset in September in Chemainus?

On the first day of September in Chemainus, Canada, sunrise is at 6:31 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:56 pm PDT.

How many hours of sunshine does Chemainus have in September?

In Chemainus, Canada, the average sunshine duration in September is 8.3h.

What is the UV index intensity in September in Chemainus?

In September, the average daily maximum UV index in Chemainus, Canada, is 3. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Chemainus, Canada

Average temperature in September - Chemainus, Canada
  • Average high temperature in September: 16.8°C

The warmest month (with the highest average high temperature) is August (20.4°C).
The month with the lowest average high temperature is December (4.1°C).

  • Average low temperature in September: 9.6°C

The month with the highest average low temperature is August (12°C).
The coldest month (with the lowest average low temperature) is December (0.5°C).

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Average pressure in September
Chemainus, Canada

Average pressure in September - Chemainus, Canada
  • Average pressure in September: 1016.2mbar

The month with the highest atmospheric pressure is July (1017.7mbar).
The month with the lowest atmospheric pressure is March (1015.4mbar).

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Average wind speed in September
Chemainus, Canada

Average wind speed in September - Chemainus, Canada
  • Average wind speed in September: 6.4km/h

The windiest month (with the highest average wind speed) is November (9.4km/h).
The calmest month (with the lowest average wind speed) is August (5.5km/h).

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Average humidity in September
Chemainus, Canada

Average humidity in September - Chemainus, Canada
  • Average humidity in September: 81%

The months with the highest relative humidity are January and December (88%).
The month with the lowest relative humidity is July (75%).

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Average rainfall in September
Chemainus, Canada

Average rainfall in September - Chemainus, Canada
  • Average rainfall in September: 73mm

The wettest month (with the highest rainfall) is January (189mm).
The driest month (with the least rainfall) is July (27mm).

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Average rainfall days in September
Chemainus, Canada

Average rainfall days in September - Chemainus, Canada
  • Average rainfall days in September: 15.2 days

The month with the highest number of rainy days is March (22.3 days).
The month with the least rainy days is August (9.3 days).

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Average snowfall in September
Chemainus, Canada

Average snowfall in September - Chemainus, Canada
  • Average snowfall in September: 0mm

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

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Average snowfall days in September
Chemainus, Canada

Average snowfall days in September - Chemainus, Canada
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Chemainus, Canada

Average daylight in September / Average sunshine in September - Chemainus, Canada
  • Average daylight in September: 12h and 4min

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 18min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 36min).

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Average sunshine days in September
Chemainus, Canada

Average sunshine days in September - Chemainus, Canada
  • Average sunshine days in September: 13.1 days

The month with the most sunshine days is August (18.5 days).
The month with the least sunshine days is March (7.2 days).

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Average UV index in September
Chemainus, Canada

Average UV index in September - Chemainus, 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, November and December (UV index 2).

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Average cloud cover in September
Chemainus, Canada

Average cloud cover in September - Chemainus, Canada
  • Average cloud cover in September: 39

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in September
Chemainus, Canada

Average visibility in September - Chemainus, Canada
  • Average visibility in September: 9km

The months with the highest visibility are March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, February, November and December (8km).

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Chemainus, Canada

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