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 average high-temperature decreases in September, shifting from a moderately hot 77.2°F (25.1°C) in August to a refreshing 67.3°F (19.6°C). During September, the nighttime temperature averages of 47.8°F (8.8°C).Humidity
In September, the average relative humidity in Cass Lake is 73%.Rainfall
In Cass Lake, during September, the rain falls for 11.5 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, in Cass Lake, there are 105.3 rainfall days, and 19.69" (500mm) of precipitation is accumulated.Snowfall
In Cass Lake, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:17 am and sunset at 6:59 pm CDT.
Sunshine
In September, the average sunshine in Cass Lake is 8h.UV index
The average daily maximum UV index in September in Cass Lake is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In September, an average UV index of 4 transforms into the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the usual temperature for Cass Lake in September?
What is the average humidity in September in Cass Lake?
How much does it rain in Cass Lake in September?
When it does not snow in Cass Lake?
Does it snow in Cass Lake in September?
What is the average length of the day in September in Cass Lake?
What time are sunrise and sunset in September in Cass Lake?
How many hours of sunshine does Cass Lake have in September?
How high is the UV index in September in Cass Lake?
Average temperature in September
Cass Lake, MN
- Average high temperature in September: 67.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (16.2°F).
- Average low temperature in September: 47.8°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (1.6°F).
Average pressure in September
Cass Lake, MN
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Cass Lake, MN
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is October (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Cass Lake, MN
- Average humidity in September: 73%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Cass Lake, MN
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is June (2.91").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in September
Cass Lake, MN
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Cass Lake, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (7.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cass Lake, MN
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (18.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Cass Lake, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h
The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 2h).
Average sunshine days in September
Cass Lake, MN
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is August (17.2 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in September
Cass Lake, MN
- 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, November and December (UV index 1).
Average cloud cover in September
Cass Lake, MN
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Cass Lake, MN
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Cass Lake, Minnesota, USA
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