September weather forecastFort Saint John, Canada
September
Weather in September
September, the first month of the autumn in Fort Saint John, is also a moderate month, with an average temperature ranging between min 4.7°C (40.5°F) and max 15.3°C (59.5°F).Temperature
Fort Saint John's progression into September includes a drop in the average high-temperature, from an agreeable 21.4°C (70.5°F) in August to a moderate 15.3°C (59.5°F). In September, the recorded average low-temperature in Fort Saint John is a cold 4.7°C (40.5°F).Humidity
In September, the average relative humidity is 70%.Rainfall
In September, in Fort Saint John, the rain falls for 12.6 days. Throughout September, 33mm (1.3") of precipitation is accumulated. In Fort Saint John, during the entire year, the rain falls for 103.7 days and collects up to 370mm (14.57") 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 1.3 snowfall days, it receives 15mm (0.59") of snow. Throughout the year, in Fort Saint John, there are 92.4 snowfall days, and 928mm (36.54") of snow is accumulated.Daylight
In September, the average length of the day is 12h and 43min.On the first day of the month, sunrise is at 6:09 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:39 pm MST.
Sunshine
In September, the average sunshine is 8.1h.UV index
In September, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 2 in September suggests the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fort Saint John, Canada
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (22.2°C).
The month with the lowest average high temperature is December (-9.2°C).
- Average low temperature in September: 4.7°C
The month with the highest average low temperature is July (9.1°C).
The coldest month (with the lowest average low temperature) is December (-16°C).
Average pressure in September
Fort Saint John, Canada
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is February (1019.3mbar).
The month with the lowest atmospheric pressure is June (1010.6mbar).
Average wind speed in September
Fort Saint John, Canada
- Average wind speed in September: 9.9km/h
The windiest months (with the highest average wind speed) are September and October (9.9km/h).
The calmest month (with the lowest average wind speed) is March (8.5km/h).
Average humidity in September
Fort Saint John, Canada
- Average humidity in September: 70%
The months with the highest relative humidity are January and March (94%).
The month with the lowest relative humidity is May (61%).
Average rainfall in September
Fort Saint John, Canada
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is June (66mm).
The driest month (with the least rainfall) is February (12mm).
Average rainfall days in September
Fort Saint John, Canada
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is December (1.5 days).
Average snowfall in September
Fort Saint John, Canada
- Average snowfall in September: 15mm
The month with the highest snowfall is November (158mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Fort Saint John, Canada
- Average snowfall days in September: 1.3 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Fort Saint John, Canada
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in September
Fort Saint John, Canada
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is December (19 days).
The month with the least sunshine days is April (11 days).
Average UV index in September
Fort Saint John, Canada
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in September
Fort Saint John, Canada
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Fort Saint John, Canada
- Average visibility in September: 9km
The months with the highest visibility are May, June, July, August and September (9km).
The months with the lowest visibility are January, February, March and December (5km).
