September weather forecastDayton, MN
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Dayton, Minnesota, with an average temperature fluctuating between 52.7°F (11.5°C) and 70.3°F (21.3°C).Temperature
September is marked by a subtle drop in average high-temperatures, transitioning from a moderately hot 78.1°F (25.6°C) in August to a pleasant 70.3°F (21.3°C). Dayton experiences an average temperature drop to a fresh 52.7°F (11.5°C) during September nights.Humidity
In Dayton, the average relative humidity in September is 75%.Rainfall
In Dayton, in September, during 11.3 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. In Dayton, during the entire year, the rain falls for 118.9 days and collects up to 20.75" (527mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Dayton, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:36 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:55 pm CDT.
Sunshine
In Dayton, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dayton, MN
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (19.2°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (6.8°F).
Average pressure in September
Dayton, MN
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Dayton, MN
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Dayton, MN
- Average humidity in September: 75%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (70%).
Average rainfall in September
Dayton, MN
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Dayton, MN
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is June (16.2 days).
The month with the least rainy days is January (2.5 days).
Average snowfall in September
Dayton, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dayton, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dayton, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Dayton, MN
- Average sunshine days in September: 16.5 days
The months with the most sunshine days are January and October (18.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in September
Dayton, 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
Dayton, MN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Dayton, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
