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
With the onset of September, Casummit Lake experiences a modest temperature adjustment, with the average high-temperature receding from a moderately hot 23°C (73.4°F) in August to a refreshing 16.6°C (61.9°F). In Casummit Lake, September nights witness a steady temperature drop to a frosty 7.3°C (45.1°F).Humidity
In Casummit Lake, the average relative humidity in September is 75%.Rainfall
In Casummit Lake, during September, the rain falls for 12.1 days and regularly aggregates up to 44mm (1.73") of precipitation. In Casummit Lake, during the entire year, the rain falls for 109.3 days and collects up to 495mm (19.49") of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Casummit Lake. Throughout September, in the average 0.5 snowfall days, it receives 4mm (0.16") of snow. In Casummit Lake, during the entire year, snow falls for 140.1 days and aggregates up to 1265mm (49.8") of snow.Daylight
The average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:48 pm CDT.
Sunshine
The average sunshine in September is 7.4h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 3 during September translates into these guidelines:
Take necessary precautions - Protection from skin and eye injury is mandatory. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
How many hours of daylight does Casummit Lake have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Casummit Lake have in September?
What is the UV index reading in September?
Average temperature in September
Casummit Lake, Canada
- Average high temperature in September: 16.6°C
The warmest month (with the highest average high temperature) is July (24.5°C).
The month with the lowest average high temperature is January (-12.9°C).
- Average low temperature in September: 7.3°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is January (-20.9°C).
Average pressure in September
Casummit Lake, Canada
- Average pressure in September: 1014.2mbar
The month with the highest atmospheric pressure is February (1020.2mbar).
The month with the lowest atmospheric pressure is June (1010.9mbar).
Average wind speed in September
Casummit Lake, Canada
- Average wind speed in September: 11.9km/h
The windiest months (with the highest average wind speed) are September and October (11.9km/h).
The calmest month (with the lowest average wind speed) is December (10.6km/h).
Average humidity in September
Casummit Lake, Canada
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is May (63%).
Average rainfall in September
Casummit Lake, Canada
- Average rainfall in September: 44mm
The wettest month (with the highest rainfall) is June (68mm).
The driest months (with the least rainfall) are February and December (21mm).
Average rainfall days in September
Casummit Lake, Canada
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is January (1.5 days).
Average snowfall in September
Casummit Lake, Canada
- Average snowfall in September: 4mm
The month with the highest snowfall is March (235mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Casummit Lake, Canada
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is January (24.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Casummit Lake, Canada
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 1h and 12min).
Average sunshine days in September
Casummit Lake, Canada
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is March (5.6 days).
Average UV index in September
Casummit Lake, Canada
- Average UV index in September: 3
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
Casummit Lake, Canada
- Average cloud cover in September: 46
The month with the most cloud cover is January (Cloud cover 89).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Casummit Lake, 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 and February (5km).
