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 sees an average high-temperature of a still moderately hot 75.9°F (24.4°C), hardly diverging from August's 81.1°F (27.3°C). Throughout September, Smithshire records an average temperature of 56.3°F (13.5°C) at night.Humidity
In September, the average relative humidity is 76%.Rainfall
In Smithshire, in September, during 11.6 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Smithshire, during the entire year, the rain falls for 149.4 days and collects up to 30.16" (766mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:34 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:46 pm CDT.
Sunshine
In Smithshire, the average sunshine in September is 9.4h.UV index
In Smithshire, Illinois, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Smithshire?
What is the average humidity in September in Smithshire?
How many days does it rain in September in Smithshire?
When it does not snow in Smithshire?
Does it snow in Smithshire in September?
How many hours of daylight does Smithshire have in September?
When are sunrise and sunset in September in Smithshire?
How long on average sun shines in September in Smithshire?
How high is the UV index in September in Smithshire?
Average temperature in September
Smithshire, IL
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in September
Smithshire, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Smithshire, IL
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Smithshire, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Smithshire, IL
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
Smithshire, IL
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Smithshire, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Smithshire, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.9 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
Smithshire, IL
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Smithshire, IL
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in September
Smithshire, IL
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Smithshire, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in September
Smithshire, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Smithshire, Illinois, USA
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