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 arrival of September signals a subtle shift in temperature, down from a moderately hot 80.2°F (26.8°C) in August to a still warm 73.4°F (23°C). Itasca experiences a steady low-temperature of 57.6°F (14.2°C) throughout September.Humidity
In Itasca, the average relative humidity in September is 75%.Rainfall
In Itasca, in September, it is raining for 12.8 days, with typically 1.69" (43mm) of accumulated precipitation. Throughout the year, there are 147.4 rainfall days, and 24.69" (627mm) of precipitation is accumulated.Snowfall
In Itasca, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:34 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Itasca in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September in Itasca?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Itasca, IL
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (81.9°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
Itasca, 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
Itasca, 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
Itasca, 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
Itasca, IL
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days in September
Itasca, IL
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Itasca, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Itasca, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Itasca, 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: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Itasca, IL
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in September
Itasca, 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
Itasca, IL
- Average cloud cover in September: 33
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 33).
Average visibility in September
Itasca, 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).
Itasca, Illinois, USA
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