September weather forecastSouth Haven, MN
September
Weather in September
The first month of the autumn, September, is still a pleasant month in South Haven, Minnesota, with an average temperature ranging between max 70.7°F (21.5°C) and min 51.8°F (11°C).Temperature
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a warm 78.4°F (25.8°C) in August to a pleasant 70.7°F (21.5°C). The low-temperature averages to a fresh 51.8°F (11°C) during the nights of September.Humidity
The average relative humidity in September in South Haven is 74%.Rainfall
In September, the rain falls for 10.8 days. Throughout September, 1.5" (38mm) of precipitation is accumulated. In South Haven, during the entire year, the rain falls for 118.3 days and collects up to 20.31" (516mm) of precipitation.Snowfall
In South Haven, snow does not fall in May through September.Daylight
In South Haven, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:53 pm. On the last day of September, in South Haven, sunrise is at 7:14 am and sunset at 6:58 pm CDT.
Sunshine
In South Haven, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Haven, MN
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in September: 51.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (5.9°F).
Average pressure in September
South Haven, MN
- Average pressure in September: 29.99"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
South Haven, MN
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
South Haven, MN
- Average humidity in September: 74%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are April and May (70%).
Average rainfall in September
South Haven, MN
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is June (3.5").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
South Haven, MN
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in September
South Haven, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.45").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
South Haven, 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 May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Haven, 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 54min
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 24min).
Average sunshine days in September
South Haven, MN
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in September
South Haven, 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
South Haven, MN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
South Haven, 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).
