September weather forecastSouth Bend, IN
September
Weather in September
September in South Bend ushers in early hints of autumn. The city experiences a significant drop in temperatures from the summer highs to a moderate 72.9°F (22.7°C). However, with a dip in temperatures, September also sees a decline in rainfall to 1.65" (42mm), making for drier days. It's a period of equilibrium, where the sweltering summer heat recedes and the brisk winter chill is yet to set it. With October on the horizon, temperatures continue their downward slope.Temperature
September is characterized by a mild reduction in the average high-temperature, from a warm 78.4°F (25.8°C) in August to an agreeable 72.9°F (22.7°C). Throughout September, South Bend anticipates an average low-temperature of 55.9°F (13.3°C).Humidity
In September, the average relative humidity is 79%.Rainfall
In September, the rain falls for 13.6 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. Throughout the year, there are 160.2 rainfall days, and 25.31" (643mm) of precipitation is accumulated.Snowfall
In South Bend, snow does not fall in June through September.Daylight
The average length of the day in September in South Bend is 12h and 28min.On the first day of the month, sunrise is at 7:11 am and sunset at 8:17 pm. On the last day of September, sunrise is at 7:41 am and sunset at 7:27 pm EDT.
Sunshine
In September, the average sunshine in South Bend is 8.2h.UV index
In South Bend, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Bend, IN
- Average high temperature in September: 72.9°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 (29.7°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
South Bend, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
South Bend, IN
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
South Bend, IN
- Average humidity in September: 79%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
South Bend, IN
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in September
South Bend, IN
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
South Bend, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
South Bend, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18 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 Bend, IN
- 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 12min).
- Average sunshine in September: 8h and 12min
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 0min).
Average sunshine days in September
South Bend, IN
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is September (13.5 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
South Bend, IN
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
South Bend, IN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
South Bend, IN
- 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).
