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 high-temperature average in September for Stoy is a still moderately hot 77.9°F (25.5°C), staying closely aligned with August's conditions. Stoy records an average nighttime low-temperature of 59.5°F (15.3°C) throughout September.Humidity
In Stoy, Illinois, the average relative humidity in September is 75%.Rainfall
September is the month with the least rainfall in Stoy. Rain falls for 11.8 days and accumulates 1.46" (37mm) of precipitation.Snowfall
In Stoy, Illinois, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September in Stoy, sunrise is at 6:20 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:35 pm CDT.
Sunshine
In Stoy, the average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index in Stoy, Illinois, is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What is the average September temperature in Stoy?
What is the average humidity in September in Stoy?
What is the driest month in Stoy?
How much does it rain in Stoy in September?
When it does not snow in Stoy?
How many hours of daylight does Stoy have in September?
What time are sunrise and sunset in September in Stoy?
How many hours of sunshine does Stoy have in September?
How high is the UV index in September in Stoy?
Average temperature in September
Stoy, IL
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in September
Stoy, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Stoy, IL
- Average wind speed in September: 6.7mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in September
Stoy, IL
- Average humidity in September: 75%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Stoy, IL
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in September
Stoy, IL
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Stoy, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Stoy, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6 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
Stoy, 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: 8h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Stoy, IL
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in September
Stoy, IL
- Average UV index in September: 5
The months with the highest UV index are May, 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
Stoy, IL
- Average cloud cover in September: 31
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Stoy, 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).
Stoy, Illinois, USA
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