September weather forecastLilbourn, MO
September
Weather in September
September, the first month of the autumn in Lilbourn, is also a moderately hot month, with an average temperature fluctuating between 81.7°F (27.6°C) and 63°F (17.2°C).Temperature
As Lilbourn transitions from August to September, the average high-temperatures adjust to a warm 81.7°F (27.6°C), nearly the same as the previous 86.4°F (30.2°C). Nighttime temperatures in September average to a refreshing 63°F (17.2°C).Heat index
For most parts of September, the heat index is evaluated at a tropical 86°F (30°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.The standards for the heat index are set for locations in shade and under light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
The average relative humidity in September is 72%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.6 days and typically collects 1.42" (36mm) of precipitation.Snowfall
April through September are months without snowfall.Daylight
The average length of the day in September in Lilbourn is 12h and 24min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:42 pm CDT.
Sunshine
The average sunshine in September is 9.6h.UV index
In Lilbourn, Missouri, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 5 suggests these recommendations:
Guard yourself - Avoiding sunburn is suggested. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lilbourn, MO
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (42.8°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in September
Lilbourn, MO
- Average pressure in September: 30.02"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
Lilbourn, MO
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Lilbourn, MO
- Average humidity in September: 72%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Lilbourn, MO
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is March (4.25").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Lilbourn, MO
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in September
Lilbourn, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Lilbourn, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 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
Lilbourn, MO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Lilbourn, MO
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is October (19.3 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in September
Lilbourn, MO
- 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, February and December (UV index 2).
Average cloud cover in September
Lilbourn, MO
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in September
Lilbourn, MO
- 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).
