September weather forecastLafayette, MN
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Lafayette, Minnesota, with an average temperature fluctuating between 72.3°F (22.4°C) and 52.9°F (11.6°C).Temperature
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a moderately hot 78.6°F (25.9°C) in August to a pleasant 72.3°F (22.4°C). An average minimum temperature of 52.9°F (11.6°C) is recorded during the month of September.Humidity
In September, the average relative humidity is 74%.Rainfall
In September, the rain falls for 9 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. In Lafayette, during the entire year, the rain falls for 96.2 days and collects up to 10.59" (269mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:15 am and sunset at 6:59 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Lafayette, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 4 during September leads to these instructions:
Guard yourself - Avoiding sunburn is suggested. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lafayette, MN
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (7°F).
Average pressure in September
Lafayette, MN
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Lafayette, MN
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in September
Lafayette, MN
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April, May and October (69%).
Average rainfall in September
Lafayette, MN
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is January (0.28").
Average rainfall days in September
Lafayette, MN
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is June (14.3 days).
The month with the least rainy days is February (1.7 days).
Average snowfall in September
Lafayette, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Lafayette, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lafayette, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Lafayette, MN
- Average sunshine days in September: 19.4 days
The months with the most sunshine days are January and November (21.8 days).
The month with the least sunshine days is June (13.4 days).
Average UV index in September
Lafayette, MN
- Average UV index in September: 4
The months with the highest UV index are June and 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
Lafayette, MN
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Lafayette, MN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
