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
Weather in September
Temperature
The commencement of September notes an average high-temperature of a still moderately hot 77.4°F (25.2°C), exhibiting little difference from the previous month. During September, Stewardson's temperature falls to a steady low-temperature average of 59.4°F (15.2°C).Humidity
The average relative humidity in September in Stewardson, Illinois, is 75%.Rainfall
In Stewardson, in September, during 11.3 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, in Stewardson, there are 135.9 rainfall days, and 21.89" (556mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Stewardson, Illinois.Daylight
In September, the average length of the day in Stewardson is 12h and 26min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:24 pm. On the last day of September, in Stewardson, sunrise is at 6:50 am and sunset at 6:38 pm CDT.
Sunshine
In Stewardson, Illinois, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A daily high UV index of 5 in September leads to these guidelines:
Put precautions into practice - Protective measures against sun-induced damage are advised. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What is the usual temperature for Stewardson in September?
What is the average humidity in September in Stewardson?
How many days does it rain in September in Stewardson?
When it does not snow in Stewardson?
What is the average length of the day in September in Stewardson?
When is the sunrise / sunset in September in Stewardson?
How long on average sun shines in September in Stewardson?
What is the UV index reading in September in Stewardson?
Average temperature in September
Stewardson, IL
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in September
Stewardson, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Stewardson, IL
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in September
Stewardson, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Stewardson, IL
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in September
Stewardson, IL
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in September
Stewardson, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Stewardson, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Stewardson, 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 30min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Stewardson, IL
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in September
Stewardson, 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
Stewardson, IL
- Average cloud cover in September: 29
The months with the most cloud cover are January and February (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in September
Stewardson, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Stewardson, Illinois, USA
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