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
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 80.1°F (26.7°C) in August to a still moderately hot 73.4°F (23°C). Nighttime temperature experiences an average drop to a mild 57.6°F (14.2°C) in September.Humidity
In September, the average relative humidity is 75%.Rainfall
In Hoffman Estates, during September, the rain falls for 12.8 days and regularly aggregates up to 1.69" (43mm) of precipitation. In Hoffman Estates, during the entire year, the rain falls for 145.9 days and collects up to 24.72" (628mm) of precipitation.Snowfall
In Hoffman Estates, Illinois, snow does not fall in June through September.Daylight
The average length of the day in September in Hoffman Estates is 12h and 28min.On the first day of September, sunrise is at 6:18 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm CDT.
Sunshine
In Hoffman Estates, Illinois, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 4 in September transforms into this advice:
Ensure safety - Recommendations to avert sunburn are presented. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Hoffman Estates in September?
What is the average humidity in September in Hoffman Estates?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Hoffman Estates have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Hoffman Estates, IL
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 57.6°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Hoffman Estates, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Hoffman Estates, IL
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Hoffman Estates, IL
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Hoffman Estates, IL
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days in September
Hoffman Estates, IL
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Hoffman Estates, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hoffman Estates, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hoffman Estates, IL
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Hoffman Estates, IL
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in September
Hoffman Estates, IL
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Hoffman Estates, IL
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 32).
Average visibility in September
Hoffman Estates, IL
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Hoffman Estates, Illinois, USA
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