September weather forecastSouth Haven, MI
September
Weather in September
September signals the commencement of the fall season in South Haven. The weather begins to cool down, providing relief from the summer heat. Despite the temperature drop, average sunshine hours remain pretty high, keeping the mood uplifting and cheerful. As the leaves start to change their colour, the city transforms into a vibrant palette of hues. Nature lovers find this transition captivating as the city paints an entirely different picture with fall's advent.Temperature
With the onset of September, South Haven's average high-temperature slightly adjusts, moderately receding from August's warm 76.3°F (24.6°C) to a pleasant 70.7°F (21.5°C). South Haven experiences a consistent average temperature of 58.3°F (14.6°C) throughout the nights in September.Humidity
The average relative humidity in September is 77%.Rainfall
In September, the rain falls for 14.5 days. Throughout September, 1.97" (50mm) of precipitation is accumulated. Throughout the year, there are 155.5 rainfall days, and 24.8" (630mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 7:11 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:27 pm EDT.
Sunshine
In South Haven, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Act with care - The need to guard against sun damage is communicated. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Haven, MI
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in September
South Haven, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
South Haven, MI
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in September
South Haven, MI
- Average humidity in September: 77%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are October and November (76%).
Average rainfall in September
South Haven, MI
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is October (2.99").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in September
South Haven, MI
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is October (16.8 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
South Haven, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
South Haven, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Haven, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
South Haven, MI
- Average sunshine days in September: 12.5 days
The months with the most sunshine days are March and July (12.8 days).
The month with the least sunshine days is January (6.3 days).
Average UV index in September
South Haven, MI
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
South Haven, MI
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in September
South Haven, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
