September weather forecastSpring Bay, IL
September
Weather in September
September, the first month of the autumn in Spring Bay, is still a warm month, with an average temperature varying between 75.9°F (24.4°C) and 56.7°F (13.7°C).Temperature
September's average high-temperature stands at a still moderately hot 75.9°F (24.4°C), showing little deviation from August's 80.4°F (26.9°C). September nights experience a consistent temperature drop to a mild 56.7°F (13.7°C).Humidity
The average relative humidity in September is 77%.Rainfall
In September, the rain falls for 10.1 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. Throughout the year, in Spring Bay, there are 123.4 rainfall days, and 15.12" (384mm) of precipitation is accumulated.Snowfall
In Spring Bay, snow does not fall in May through September.Daylight
In Spring Bay, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine in Spring Bay is 9.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Spring Bay, IL
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in September
Spring Bay, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Spring Bay, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Spring Bay, IL
- Average humidity in September: 77%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Spring Bay, IL
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Spring Bay, IL
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in September
Spring Bay, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Spring Bay, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 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
Spring Bay, IL
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Spring Bay, IL
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (12.4 days).
Average UV index in September
Spring Bay, IL
- 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 and December (UV index 1).
Average cloud cover in September
Spring Bay, IL
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in September
Spring Bay, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
