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 arrival aligns with a minor decrease in average high-temperatures, from August's hot 87.4°F (30.8°C) to a moderately hot 81.7°F (27.6°C). Greenville reports an average low-temperature of 61.9°F (16.6°C) during the nights of September.Heat index
The heat index in September is evaluated at a tropical 86°F (30°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
The average relative humidity in September is 73%.Rainfall
September is the month with the least rainfall in Greenville, Missouri. Rain falls for 11.8 days and accumulates 1.77" (45mm) of precipitation.Snowfall
In Greenville, snow does not fall in April through September.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 6:33 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:46 pm CDT.
Sunshine
In Greenville, the average sunshine in September is 9.7h.UV index
The average daily maximum UV index in September in Greenville is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 5 translates into these guidelines:
Make use of precautions - It is urged to ward off sun damage. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Greenville in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow in Greenville?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Greenville have in September?
What is the UV index intensity in September?
Average temperature in September
Greenville, MO
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28°F).
Average pressure in September
Greenville, 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 (29.93"Hg).
Average wind speed in September
Greenville, MO
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is February (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Greenville, MO
- Average humidity in September: 73%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Greenville, MO
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Greenville, MO
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (9.6 days).
Average snowfall in September
Greenville, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Greenville, 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
Greenville, 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 4min
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 48min).
Average sunshine days in September
Greenville, MO
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is October (19.3 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Greenville, 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 and December (UV index 2).
Average cloud cover in September
Greenville, MO
- Average cloud cover in September: 28
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Greenville, 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).
Greenville, Missouri, USA
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