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
Weather in September
Temperature
The transition into September involves a decrease in the average high-temperature, falling from a warm 25.6°C (78.1°F) in August to a refreshing 19.5°C (67.1°F). Stony Mountain encounters a steady low-temperature average of 10°C (50°F) throughout the month of September.Humidity
In September, the average relative humidity is 64%.Rainfall
In Stony Mountain, Canada, in September, during 10.2 rainfall days, 43mm (1.69") of precipitation is typically accumulated. Throughout the year, there are 101.8 rainfall days, and 395mm (15.55") of precipitation is accumulated.Snowfall
In Stony Mountain, snow does not fall in June through September.Daylight
The average length of the day in September in Stony Mountain is 12h and 35min.On the first day of September, sunrise is at 6:45 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:08 pm CDT.
Sunshine
In Stony Mountain, the average sunshine in September is 8.4h.UV index
In Stony Mountain, Canada, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What are the temperatures in Stony Mountain in September?
What is the average humidity in September in Stony Mountain?
How much does it rain in Stony Mountain in September?
When it does not snow in Stony Mountain?
Does it snow in Stony Mountain in September?
What is the average length of the day in September in Stony Mountain?
What time are sunrise and sunset in September in Stony Mountain?
How long on average sun shines in September in Stony Mountain?
What is the UV index reading in September in Stony Mountain?
Average temperature in September
Stony Mountain, Canada
- Average high temperature in September: 19.5°C
The warmest month (with the highest average high temperature) is August (25.6°C).
The month with the lowest average high temperature is January (-11.3°C).
- Average low temperature in September: 10°C
The month with the highest average low temperature is July (14.8°C).
The coldest month (with the lowest average low temperature) is January (-18.5°C).
Average pressure in September
Stony Mountain, Canada
- Average pressure in September: 1013.9mbar
The month with the highest atmospheric pressure is February (1020.9mbar).
The month with the lowest atmospheric pressure is June (1010.5mbar).
Average wind speed in September
Stony Mountain, Canada
- Average wind speed in September: 14.8km/h
The windiest month (with the highest average wind speed) is October (16km/h).
The calmest month (with the lowest average wind speed) is August (12.8km/h).
Average humidity in September
Stony Mountain, Canada
- Average humidity in September: 64%
The months with the highest relative humidity are January and February (92%).
The months with the lowest relative humidity are May and August (63%).
Average rainfall in September
Stony Mountain, Canada
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is June (70mm).
The driest month (with the least rainfall) is February (10mm).
Average rainfall days in September
Stony Mountain, Canada
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (1.2 days).
Average snowfall in September
Stony Mountain, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is November (91mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Stony Mountain, Canada
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Stony Mountain, Canada
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Stony Mountain, Canada
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is December (18.9 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in September
Stony Mountain, Canada
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 1).
Average cloud cover in September
Stony Mountain, Canada
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Stony Mountain, Canada
- Average visibility in September: 10km
The months with the highest visibility are August and September (10km).
The month with the lowest visibility is January (7km).
Stony Mountain, Canada
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