September weather forecast and climate
Banff, Canada

September, the first month of the autumn, in Banff, is also a fresh month, with average temperature ranging between min 1.7°C (35.1°F) and max 11.5°C (52.7°F).

Temperature

In September, the average high-temperature decreases, from an enjoyable 16.9°C (62.4°F) in August, to a cool 11.5°C (52.7°F). In Banff, in September, the average low-temperature is 1.7°C (35.1°F).

Humidity

In September, the average relative humidity is 69%.

Rainfall

In Banff, in September, during 13.4 rainfall days, 39mm (1.54") of precipitation is typically accumulated. In Banff, during the entire year, the rain falls for 166.4 days and collects up to 589mm (23.19") of precipitation.

Snowfall

January through June, September through December are months with snowfall in Banff. September is the first month it typically snows. Throughout September, in the average 2.1 snowfall days, it receives 61mm (2.4") of snow. Throughout the year, in Banff, Canada, there are 133.1 snowfall days, and 1671mm (65.79") of snow is accumulated.

Daylight

In September, the average length of the day in Banff is 12.6h.

Sunshine

The average sunshine in Banff, Canada, is 8.8h.

UV index

The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in September transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in September in Banff?

In September, the average high-temperature is 11.5°C (52.7°F), and the average low-temperature is 1.7°C (35.1°F).

What is the average humidity in September in Banff?

In September, the average relative humidity in Banff, Canada, is 69%.

How many days does it rain in September in Banff?

In Banff, Canada, in September, it is raining for 13.4 days, with typically 39mm (1.54") of accumulated precipitation.

When does it start to snow in Banff?

September is the first month it typically snows in Banff, Canada. Throughout September, in the average 2.1 snowfall days, it receives 61mm (2.4") of snow.

How many hours of daylight does Banff have in September?

The average length of the day in September in Banff, Canada, is 12.6h.

How long on average sun shines in September in Banff?

The average sunshine in September in Banff is 8.8h.

What is the UV index intensity in September in Banff?

In Banff, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Banff, Canada
  • Average high temperature in September: 11.5°C

The warmest month (with the highest average high temperature) is July (17°C).
The month with the lowest average high temperature is December (-8.1°C).

  • Average low temperature in September: 1.7°C

The month with the highest average low temperature is July (6°C).
The coldest month (with the lowest average low temperature) is February (-15.9°C).

Average pressure in September - Banff, Canada
  • Average pressure in September: 1014.5mbar

The month with the highest atmospheric pressure is December (1019.8mbar).
The month with the lowest atmospheric pressure is June (1011.7mbar).

Average wind speed in September - Banff, Canada
  • Average wind speed in September: 8.4km/h

The windiest month (with the highest average wind speed) is January (11.2km/h).
The calmest month (with the lowest average wind speed) is August (7.2km/h).

Average humidity in September - Banff, Canada
  • Average humidity in September: 69%

Months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is August (62%).

Average rainfall in September - Banff, Canada
  • Average rainfall in September: 39mm

The wettest month (with the highest rainfall) is June (116mm).
The driest month (with the least rainfall) is January (18mm).

Average rainfall days in September - Banff, Canada
  • Average rainfall days in September: 13.4 days

The month with the highest number of rainy days is June (22.5 days).
The month with the least rainy days is January (9.9 days).

Average snowfall in September - Banff, Canada
  • Average snowfall in September: 61mm

The month with the highest snowfall is April (324mm).
Months with the least snowfall are July and August (0mm).

Average snowfall days in September - Banff, Canada
  • Average snowfall days in September: 2.1 days

The month with the highest number of snowfall days is March (21.2 days).
The month with the least snowfall days is July (0 days).

Average daylight in September / Average sunshine in September - Banff, Canada
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.5h).
The month with the shortest days is December (Average daylight: 8h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is August (Average sunshine: 11h).
Months with the least sunshine are January and December (Average sunshine: 4.8).

Average sunshine days in September - Banff, Canada
  • Average sunshine days in September: 13.4 days

The month with the most sunshine days is September (13.4 days).
The month with the least sunshine days is June (4.3 days).

Average UV index in September - Banff, Canada
  • Average UV index in September: 2

The month with the highest UV index is July (UV index 4).
Months with the lowest UV index are January, February, March, October and November (UV index 1).

Average cloud cover in September - Banff, Canada
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).

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

Months with the highest visibility are June, July, August, September and October (9km).
Months with the lowest visibility are January, February, March, April and December (7km).