September weather forecastBluffton, MN
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Bluffton, Minnesota, with an average temperature ranging between max 68.9°F (20.5°C) and min 49.8°F (9.9°C).Temperature
The arrival of September indicates a decrease in the average high-temperature, moving from a warm 77.9°F (25.5°C) in August to a pleasant 68.9°F (20.5°C). In Bluffton, in September, the average low-temperature is a frosty 49.8°F (9.9°C).Humidity
In September, the average relative humidity is 73%.Rainfall
In September, the rain falls for 8.5 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, there are 95.6 rainfall days, and 13.9" (353mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Bluffton, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:59 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:02 pm CDT.
Sunshine
In Bluffton, the average sunshine in September is 8.8h.UV index
In Bluffton, Minnesota, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 4 during September translates into these guidelines:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bluffton, MN
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (16.9°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (3.7°F).
Average pressure in September
Bluffton, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Bluffton, MN
- Average wind speed in September: 8.2mph
The windiest months (with the highest average wind speed) are April and October (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Bluffton, MN
- Average humidity in September: 73%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Bluffton, MN
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is June (2.48").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days in September
Bluffton, MN
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is February (1 days).
Average snowfall in September
Bluffton, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bluffton, MN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bluffton, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Bluffton, MN
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in September
Bluffton, 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
Bluffton, MN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
Bluffton, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
