September weather forecastFort Simpson, Canada
September
Weather in September
September, the first month of the autumn in Fort Simpson, is also a moderate month, with an average temperature varying between 4.6°C (40.3°F) and 13.9°C (57°F).Temperature
September comes with a decrease in the average high-temperature, falling from an agreeable 21.2°C (70.2°F) in August to a moderate 13.9°C (57°F). September brings an average low-temperature of 4.6°C (40.3°F) to Fort Simpson.Humidity
The average relative humidity in September is 71%.Rainfall
In Fort Simpson, in September, during 8.8 rainfall days, 18mm (0.71") of precipitation is typically accumulated. Throughout the year, in Fort Simpson, there are 64.3 rainfall days, and 202mm (7.95") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Fort Simpson, Canada. Throughout September, in the average 0.6 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, in Fort Simpson, there are 75.9 snowfall days, and 452mm (17.8") of snow is accumulated.Daylight
In September, the average length of the day is 12h and 53min.On the first day of September in Fort Simpson, sunrise is at 6:57 am and sunset at 9:12 pm. On the last day of the month, sunrise is at 8:12 am and sunset at 7:38 pm MDT.
Sunshine
In September, the average sunshine is 7.5h.UV index
In Fort Simpson, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 2 translates into these guidelines:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fort Simpson, Canada
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is July (24°C).
The month with the lowest average high temperature is January (-17.9°C).
- Average low temperature in September: 4.6°C
The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is January (-24.8°C).
Average pressure in September
Fort Simpson, Canada
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is February (1020.3mbar).
The month with the lowest atmospheric pressure is August (1010mbar).
Average wind speed in September
Fort Simpson, Canada
- Average wind speed in September: 9km/h
The windiest month (with the highest average wind speed) is May (9.6km/h).
The calmest month (with the lowest average wind speed) is December (7.5km/h).
Average humidity in September
Fort Simpson, Canada
- Average humidity in September: 71%
The month with the highest relative humidity is January (96%).
The month with the lowest relative humidity is June (53%).
Average rainfall in September
Fort Simpson, Canada
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is August (37mm).
The driest month (with the least rainfall) is December (4mm).
Average rainfall days in September
Fort Simpson, Canada
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is August (11.1 days).
The month with the least rainy days is November (0.2 days).
Average snowfall in September
Fort Simpson, Canada
- Average snowfall in September: 2mm
The month with the highest snowfall is April (102mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Fort Simpson, Canada
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is March (13 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Fort Simpson, Canada
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 30min).
The month with the shortest days is December (Average daylight: 5h and 24min).
- Average sunshine in September: 7h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in September
Fort Simpson, Canada
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is December (23.5 days).
The month with the least sunshine days is April (14.3 days).
Average UV index in September
Fort Simpson, Canada
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Fort Simpson, Canada
- Average cloud cover in September: 42
The months with the most cloud cover are March and April (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Fort Simpson, Canada
- Average visibility in September: 9km
The months with the highest visibility are June and July (10km).
The months with the lowest visibility are January, February, March and December (4km).
