Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Springfield starts September with an average high-temperature of a still moderately hot 25.2°C, hinting at a minimal fluctuation from August. During September, Springfield's temperature falls to a steady low-temperature average of 14.7°C.Humidity
In September, the average relative humidity is 75%.Rainfall
In Springfield, in September, it is raining for 12.3 days, with typically 58mm of accumulated precipitation. In Springfield, during the entire year, the rain falls for 140.2 days and collects up to 591mm of precipitation.Snowfall
In Springfield, snow does not fall in May through October.Daylight
In Springfield, Illinois, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:27 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:42 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Springfield in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Springfield have in September?
What is the UV index reading in September?
Average temperature in September
Springfield, IL
- Average high temperature in September: 25.2°C
The warmest month (with the highest average high temperature) is July (28.2°C).
The month with the lowest average high temperature is January (0.8°C).
- Average low temperature in September: 14.7°C
The month with the highest average low temperature is July (18.9°C).
The coldest month (with the lowest average low temperature) is January (-6.2°C).
Average pressure in September
Springfield, IL
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is January (1020.9mbar).
The month with the lowest atmospheric pressure is June (1013mbar).
Average wind speed in September
Springfield, IL
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is January (16.7km/h).
The calmest months (with the lowest average wind speed) are July and August (9.9km/h).
Average humidity in September
Springfield, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Springfield, IL
- Average rainfall in September: 58mm
The wettest month (with the highest rainfall) is June (69mm).
The driest month (with the least rainfall) is December (30mm).
Average rainfall days in September
Springfield, IL
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Springfield, IL
- Average snowfall in September: 0mm
The month with the highest snowfall is January (57mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Springfield, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.5 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
Springfield, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Springfield, IL
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in September
Springfield, IL
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Springfield, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in September
Springfield, IL
- Average visibility in September: 9km
The month with the highest visibility is October (10km).
The months with the lowest visibility are July and August (8km).