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 shift into September reveals an average high-temperature of a still warm 79°F (26.1°C), closely mirroring August's climate. An average low-temperature of 60.1°F (15.6°C) is noted during the nights in September in Belle Rive.Humidity
In Belle Rive, the average relative humidity in September is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.61" (41mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 6:25 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:38 pm CDT.
Sunshine
The average sunshine in September in Belle Rive is 9.3h.UV index
In September, the average daily maximum UV index in Belle Rive, Illinois, is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 5 during September leads to these advisories:
Exercise prevention - Precautions against solar damage are endorsed. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What are September temperatures in Belle Rive?
What is the average humidity in September in Belle Rive?
What is the driest month in Belle Rive?
How much does it rain in Belle Rive in September?
When it does not snow in Belle Rive?
What is the average length of the day in September in Belle Rive?
When is the sunrise / sunset in September in Belle Rive?
How long on average sun shines in September in Belle Rive?
What is the UV index reading in September in Belle Rive?
Average temperature in September
Belle Rive, IL
- Average high temperature in September: 79°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Belle Rive, IL
- Average pressure in September: 30.03"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
Belle Rive, IL
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in September
Belle Rive, IL
- Average humidity in September: 74%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Belle Rive, IL
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is April (3.78").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
Belle Rive, IL
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Belle Rive, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Belle Rive, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Belle Rive, 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 2min
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 30min).
Average sunshine days in September
Belle Rive, IL
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
Belle Rive, 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, November and December (UV index 2).
Average cloud cover in September
Belle Rive, IL
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in September
Belle Rive, 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).
Belle Rive, Illinois, USA
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