September weather forecastLethbridge, Canada
September
Weather in September
The advent of September signals the beginning of the fall season in Lethbridge. The city sees a drastic change from the high temperatures in August, adding an unmistakable chill in the air. Outdoors are cloaked in fall colors as the temperatures begin their descent. Rains and winds maintain a steady pace, staying mostly average. The sweaters slowly make their way out of the wardrobe as the temperatures continue to fall.Temperature
Observing a mild shift, the average high-temperature during September reduces from August's warm 26°C (78.8°F) to a pleasant 20.4°C (68.7°F). During the month of September, Lethbridge's nighttime temperature lowers to an average of 8.8°C (47.8°F).Humidity
In September, the average relative humidity in Lethbridge is 50%.Rainfall
In Lethbridge, in September, it is raining for 6.6 days, with typically 22mm (0.87") of accumulated precipitation. Throughout the year, there are 84.3 rainfall days, and 280mm (11.02") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 26mm (1.02") of snow. Throughout the year, in Lethbridge, Canada, there are 51.2 snowfall days, and 529mm (20.83") of snow is accumulated.Daylight
In Lethbridge, the average length of the day in September is 12h and 35min.On the first day of September in Lethbridge, sunrise is at 6:48 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:11 pm MDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index in Lethbridge, Canada, is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lethbridge, Canada
- Average high temperature in September: 20.4°C
The warmest month (with the highest average high temperature) is July (26.1°C).
The month with the lowest average high temperature is December (-2.7°C).
- Average low temperature in September: 8.8°C
The month with the highest average low temperature is August (12.4°C).
The coldest month (with the lowest average low temperature) is December (-9.2°C).
Average pressure in September
Lethbridge, Canada
- Average pressure in September: 1013.9mbar
The month with the highest atmospheric pressure is January (1019.8mbar).
The month with the lowest atmospheric pressure is June (1011mbar).
Average wind speed in September
Lethbridge, Canada
- Average wind speed in September: 13.7km/h
The windiest month (with the highest average wind speed) is January (17.5km/h).
The calmest month (with the lowest average wind speed) is August (12.3km/h).
Average humidity in September
Lethbridge, Canada
- Average humidity in September: 50%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in September
Lethbridge, Canada
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is June (66mm).
The driest month (with the least rainfall) is January (7mm).
Average rainfall days in September
Lethbridge, Canada
- Average rainfall days in September: 6.6 days
The month with the highest number of rainy days is June (14.8 days).
The month with the least rainy days is February (1.6 days).
Average snowfall in September
Lethbridge, Canada
- Average snowfall in September: 26mm
The month with the highest snowfall is April (91mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Lethbridge, Canada
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Lethbridge, Canada
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Lethbridge, Canada
- Average sunshine days in September: 20.4 days
The month with the most sunshine days is December (22.8 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in September
Lethbridge, Canada
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Lethbridge, Canada
- Average cloud cover in September: 24
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 18).
Average visibility in September
Lethbridge, Canada
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, November and December (9km).
