September weather forecastFerris, IL
September
Weather in September
September, the first month of the autumn in Ferris, is also a moderately hot month, with an average temperature fluctuating between 77.2°F (25.1°C) and 57.7°F (14.3°C).Temperature
The onset of September manifests an average high-temperature of a still warm 77.2°F (25.1°C), demonstrating a minor variation from the preceding month. In the month of September, the nighttime temperature in Ferris, Illinois, dips to a steady average of 57.7°F (14.3°C).Humidity
The average relative humidity in September is 75%.Rainfall
In Ferris, Illinois, during September, the rain falls for 10.5 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Ferris, during the entire year, the rain falls for 128.2 days and collects up to 20.08" (510mm) of precipitation.Snowfall
In Ferris, Illinois, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:32 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:47 pm CDT.
Sunshine
The average sunshine in September in Ferris, Illinois, is 9.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. It's recommended to limit sun exposure when its radiation is at its peak during midday. 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
Average temperature in September
Ferris, IL
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in September
Ferris, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Ferris, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
Ferris, 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 (70%).
Average rainfall in September
Ferris, IL
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Ferris, IL
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in September
Ferris, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.48").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Ferris, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.2 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
Ferris, IL
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Ferris, IL
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in September
Ferris, IL
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Ferris, 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 July, August and September (Cloud cover 29).
Average visibility in September
Ferris, 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).
