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 transition into September subtly indicates a reduction in the average high-temperature, down to a warm 79.9°F (26.6°C) from August's tropical 87.1°F (30.6°C). Nightly temperatures drop to an average low of 61.2°F (16.2°C) in September.Humidity
The average relative humidity in September is 74%.Rainfall
In Carterville, in September, during 12.5 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, there are 143.4 rainfall days, and 32.01" (813mm) of precipitation is accumulated.Snowfall
In Carterville, snow does not fall in April, June through October.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:49 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:02 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Carterville, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September in Carterville?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Carterville, MO
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (42.3°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in September
Carterville, MO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Carterville, MO
- Average wind speed in September: 7.7mph
The windiest months (with the highest average wind speed) are March and April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Carterville, MO
- Average humidity in September: 74%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Carterville, MO
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is May (5.04").
The driest month (with the least rainfall) is February (1.54").
Average rainfall days in September
Carterville, MO
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (16.8 days).
The months with the least rainy days are January and December (6.8 days).
Average snowfall in September
Carterville, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.44").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
Carterville, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Carterville, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Carterville, MO
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is December (21.1 days).
The month with the least sunshine days is May (12.2 days).
Average UV index in September
Carterville, MO
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Carterville, MO
- Average cloud cover in September: 28
The months with the most cloud cover are February and March (Cloud cover 45).
The months with the least cloud cover are June, July and August (Cloud cover 25).
Average visibility in September
Carterville, 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).
Carterville, Missouri, USA
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