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 onset of September brings a small shift in high-temperatures, falling from a warm 84.4°F (29.1°C) in August to a still moderately hot 78.3°F (25.7°C). An average low-temperature of 58.6°F (14.8°C) is noted during the nights in September.Humidity
In September, the average relative humidity is 74%.Rainfall
In Clarksville, during September, the rain falls for 11.9 days and regularly aggregates up to 2.36" (60mm) of precipitation. In Clarksville, Missouri, during the entire year, the rain falls for 142.7 days and collects up to 27.64" (702mm) of precipitation.Snowfall
May through September are months without snowfall in Clarksville.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:32 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September in Clarksville is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Clarksville?
What is the average humidity in September in Clarksville?
How much does it rain in Clarksville in September?
When it does not snow in Clarksville?
Does it snow in Clarksville in September?
How many hours of daylight does Clarksville have in September?
When are sunrise and sunset in September in Clarksville?
How many hours of sunshine does Clarksville have in September?
What is the UV index reading in September in Clarksville?
Average temperature in September
Clarksville, MO
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in September
Clarksville, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Clarksville, MO
- Average wind speed in September: 6.8mph
The windiest months (with the highest average wind speed) are January and February (9.7mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in September
Clarksville, MO
- Average humidity in September: 74%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Clarksville, MO
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in September
Clarksville, MO
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (17.3 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in September
Clarksville, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Clarksville, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.5 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
Clarksville, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days in September
Clarksville, MO
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Clarksville, MO
- 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
Clarksville, MO
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility in September
Clarksville, 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).
Clarksville, Missouri, USA
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