September weather forecastLawrenceville, IL
September
Weather in September
September, the first month of the autumn in Lawrenceville, is still a warm month, with an average temperature fluctuating between 60.1°F (15.6°C) and 78.3°F (25.7°C).Temperature
The average high-temperature during September is a still warm 78.3°F (25.7°C), almost matching the conditions of the preceding month. Lawrenceville's average low-temperature for the month of September records at a moderate 60.1°F (15.6°C).Humidity
In September, the average relative humidity is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 13.1 days and accumulates 1.93" (49mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day in Lawrenceville is 12h and 26min.On the first day of the month, sunrise is at 6:20 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:34 pm CDT.
Sunshine
In Lawrenceville, the average sunshine in September is 9.1h.UV index
In Lawrenceville, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lawrenceville, IL
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Lawrenceville, 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 (29.94"Hg).
Average wind speed in September
Lawrenceville, IL
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in September
Lawrenceville, IL
- Average humidity in September: 74%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Lawrenceville, IL
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is April (4.69").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Lawrenceville, IL
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is February (9.4 days).
Average snowfall in September
Lawrenceville, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Lawrenceville, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 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
Lawrenceville, IL
- Average daylight in September: 12h and 24min
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 30min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in September
Lawrenceville, IL
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is October (18 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in September
Lawrenceville, IL
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Lawrenceville, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Lawrenceville, 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).
