Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September brings a minor decrease, with the average high-temperature reducing from a comfortable 16.9°C (62.4°F) in August to a fresh 11.5°C (52.7°F). The nighttime temperature, during September, averages of 1.7°C (35.1°F).Humidity
In Banff, the average relative humidity in September 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
Months with snowfall are January through June, September through December. 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, there are 133.1 snowfall days, and 1671mm (65.79") of snow is accumulated.Daylight
In September, the average length of the day is 12h and 37min.On the first day of September, sunrise is at 6:56 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:21 pm MDT.
Sunshine
In September, the average sunshine 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 low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during September translates into the following guidance:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Banff in September?
What is the average humidity in September in Banff?
How many days does it rain in September?
When does it start snowing?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Banff have in September?
How high is the UV index in September?
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%
The 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).
The 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: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).
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).
The 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
The months with the highest visibility are June, July, August, September and October (9km).
The months with the lowest visibility are January, February, March, April and December (7km).
