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 onset introduces a mild reduction in the average high-temperature, from a moderately hot 80.4°F (26.9°C) in August to a still warm 74.3°F (23.5°C). September brings an average low-temperature of 57.4°F (14.1°C) to Lockport.Humidity
In Lockport, the average relative humidity in September is 77%.Rainfall
In Lockport, in September, it is raining for 9.6 days, with typically 0.87" (22mm) of accumulated precipitation. In Lockport, during the entire year, the rain falls for 103.8 days and collects up to 10.08" (256mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:35 pm CDT.
Sunshine
In Lockport, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Direct Sun exposure should be minimized especially during midday when radiation is most intense. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Lockport have in September?
What is the UV index reading in September in Lockport?
Average temperature in September
Lockport, IL
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in September
Lockport, 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
Lockport, IL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Lockport, IL
- Average humidity in September: 77%
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
Lockport, IL
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is May (1.38").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in September
Lockport, IL
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Lockport, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Lockport, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (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
Lockport, 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 12min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Lockport, IL
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is December (22.3 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in September
Lockport, IL
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Lockport, IL
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Lockport, 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).
Lockport, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location