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
Percy's transition into September involves a gentle shift in temperature, receding from a moderately hot 85.6°F (29.8°C) in August to a still warm 79.7°F (26.5°C). Throughout the month of September, Percy witnesses an average temperature of 60.1°F (15.6°C).Humidity
The average relative humidity in September in Percy is 74%.Rainfall
The months with the least rainfall in Percy are February and September Rain falls for 12.6 days and accumulates 2.13" (54mm) of rain.Snowfall
In Percy, snow does not fall in May through September.Daylight
In Percy, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:27 pm. On the last day of September, in Percy, sunrise is at 6:53 am and sunset at 6:42 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
The average daily maximum UV index in September in Percy is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: An average UV index of 5 in September transforms into this advice:
Undertake precautions - Guarding against sun damage is counselled. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Percy in September?
What is the average humidity in September in Percy?
What is the driest month in Percy?
How many days does it rain in September in Percy?
When it does not snow in Percy?
Does it snow in Percy in September?
How many hours of daylight does Percy have in September?
When is the sunrise / sunset in September in Percy?
How long on average sun shines in September in Percy?
What is the UV index intensity in September in Percy?
Average temperature in September
Percy, IL
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in September
Percy, IL
- Average pressure in September: 30.02"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
Percy, IL
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Percy, IL
- Average humidity in September: 74%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Percy, IL
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is May (4.49").
The driest months (with the least rainfall) are February and September (2.13").
Average rainfall days in September
Percy, IL
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Percy, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Percy, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 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
Percy, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- 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 36min).
Average sunshine days in September
Percy, IL
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in September
Percy, 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 and December (UV index 2).
Average cloud cover in September
Percy, IL
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Percy, 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).
Percy, Illinois, USA
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