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 shift from August to September coincides with a small decrease in the average high-temperature, down to a warm 84°F (28.9°C) from a hot 90.7°F (32.6°C). In the month of September, Clarksville witnesses a marked temperature drop at night, averaging a low of 61.7°F (16.5°C).Heat index
The heat index value during September is appraised at a tropical 91.4°F (33°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Humidity
In Clarksville, the average relative humidity in September is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.2 days and typically collects 1.93" (49mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:46 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:58 pm CDT.
Sunshine
In Clarksville, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
What is the driest month in Clarksville?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Clarksville have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Clarksville, AR
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (46.9°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Clarksville, AR
- 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 (29.94"Hg).
Average wind speed in September
Clarksville, AR
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Clarksville, AR
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (79%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in September
Clarksville, AR
- Average rainfall in September: 1.93"
The wettest months (with the highest rainfall) are April and May (4.41").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Clarksville, AR
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Clarksville, AR
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Clarksville, AR
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Clarksville, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Clarksville, AR
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in September
Clarksville, AR
- 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 and December (UV index 2).
Average cloud cover in September
Clarksville, AR
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 46).
The months with the least cloud cover are August and September (Cloud cover 28).
Average visibility in September
Clarksville, AR
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, November and December (5mi).
Clarksville, Arkansas, USA
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