September weather forecast
Duncan, Canada

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Weather in September

September, the first month of the autumn in Duncan, is also an enjoyable month, with an average temperature fluctuating between 17.2°C (63°F) and 11.8°C (53.2°F).

Temperature

The advent of September brings a slight shift in average high-temperature, moving from a pleasant 20.2°C (68.4°F) in August to a refreshing 17.2°C (63°F). In Duncan, the September nights cool down to an average low of 11.8°C (53.2°F).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Duncan, in September, during 4.9 rainfall days, 6mm (0.24") of precipitation is typically accumulated. Throughout the year, there are 72.5 rainfall days, and 163mm (6.42") of precipitation is accumulated.

Snowfall

In Duncan, snow does not fall in April through October.

Daylight

In Duncan, Canada, the average length of the day in September is 12h and 34min.
On the first day of September, sunrise is at 6:33 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:54 pm PDT.

Sunshine

In September, the average sunshine is 9.6h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

What are the temperatures in Duncan in September?

During September, Duncan experiences an average high-temperature of 17.2°C (63°F) and a low-temperature of 11.8°C (53.2°F).

What is the average humidity in September in Duncan?

In September, the average relative humidity is 79%.

How many days does it rain in September in Duncan?

In September, in Duncan, the rain falls for 4.9 days. Throughout September, 6mm (0.24") of precipitation is accumulated.

When it does not snow in Duncan?

In Duncan, snow does not fall in April through October.

How many hours of daylight does Duncan have in September?

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

What time are sunrise and sunset in September in Duncan?

On the first day of September, sunrise is at 6:33 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:54 pm PDT.

How many hours of sunshine does Duncan have in September?

In Duncan, the average sunshine duration in September is 9.6h.

What is the UV index reading in September in Duncan?

The average daily maximum UV index in September in Duncan, Canada, is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Duncan, Canada

Average temperature in September - Duncan, Canada
  • Average high temperature in September: 17.2°C

The warmest months (with the highest average high temperature) are July and August (20.2°C).
The month with the lowest average high temperature is December (6.3°C).

  • Average low temperature in September: 11.8°C

The month with the highest average low temperature is August (13.7°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).

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Average pressure in September
Duncan, Canada

Average pressure in September - Duncan, Canada
  • Average pressure in September: 1016.4mbar

The months with the highest atmospheric pressure are January and July (1017.8mbar).
The month with the lowest atmospheric pressure is March (1015.7mbar).

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Average wind speed in September
Duncan, Canada

Average wind speed in September - Duncan, Canada
  • Average wind speed in September: 6.8km/h

The windiest month (with the highest average wind speed) is November (11.8km/h).
The calmest month (with the lowest average wind speed) is August (5.9km/h).

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Average humidity in September
Duncan, Canada

Average humidity in September - Duncan, Canada
  • Average humidity in September: 79%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (73%).

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Average rainfall in September
Duncan, Canada

Average rainfall in September - Duncan, Canada
  • Average rainfall in September: 6mm

The wettest month (with the highest rainfall) is January (37mm).
The driest months (with the least rainfall) are July and August (3mm).

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Average rainfall days in September
Duncan, Canada

Average rainfall days in September - Duncan, Canada
  • Average rainfall days in September: 4.9 days

The month with the highest number of rainy days is December (8.6 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in September
Duncan, Canada

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

The month with the highest snowfall is February (53mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Duncan, Canada

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

The month with the highest number of snowfall days is February (2.8 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
Duncan, Canada

Average daylight in September / Average sunshine in September - Duncan, 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: 9h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).

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Average sunshine days in September
Duncan, Canada

Average sunshine days in September - Duncan, Canada
  • Average sunshine days in September: 24.2 days

The month with the most sunshine days is August (28.2 days).
The month with the least sunshine days is February (17.4 days).

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Average UV index in September
Duncan, Canada

Average UV index in September - Duncan, Canada
  • Average UV index in September: 4

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
Duncan, Canada

Average cloud cover in September - Duncan, Canada
  • Average cloud cover in September: 28

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 20).

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Average visibility in September
Duncan, Canada

Average visibility in September - Duncan, Canada
  • Average visibility in September: 10km

The months with the highest visibility are March, April, May, June, July, August, September, October and December (10km).
The months with the lowest visibility are January, February and November (9km).

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Duncan, Canada

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