September weather forecast and climate
Clarksville, OH

September, the first month of the autumn, in Clarksville, is also a moderately hot month, with average temperature fluctuating between 57.4°F (14.1°C) and 76.1°F (24.5°C).

Temperature

In Clarksville, Ohio, the average high-temperature in September is almost the same as in August - a still moderately hot 76.1°F (24.5°C). The average low-temperature, in Clarksville, Ohio, is 57.4°F (14.1°C).

Humidity

In September, the average relative humidity is 77%.

Rainfall

September is the month with the least rainfall in Clarksville. Rain falls for 11 days and accumulates 0.87" (22mm) of precipitation.

Snowfall

In Clarksville snow does not fall in May through September.

Daylight

The average length of the day in Clarksville is 12.4h.

Sunshine

In Clarksville, the average sunshine in September is 8.2h.

UV index

The average daily maximum UV index in Clarksville is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in September in Clarksville?

In September, in Clarksville, Ohio, the average high-temperature is 76.1°F (24.5°C), and the average low-temperature is 57.4°F (14.1°C).

What is the average humidity in September in Clarksville?

The average relative humidity in September in Clarksville, Ohio, is 77%.

How many days does it rain in September in Clarksville?

In Clarksville, Ohio, in September, during 11 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

What is the driest month in Clarksville?

September is the month with the least rainfall in Clarksville, Ohio. Rain falls for 11 days and accumulates 0.87" (22mm) of precipitation.

Does it snow in Clarksville in September?

In Clarksville, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Clarksville?

In Clarksville snow does not fall in May through September.

What is the average length of the day in September in Clarksville?

In Clarksville, the average length of the day in September is 12.4h.

How many hours of sunshine does Clarksville have in September?

In September, the average sunshine in Clarksville is 8.2h.

What is the UV index intensity in September in Clarksville?

In September, the average daily maximum UV index in Clarksville is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Clarksville, OH
  • Average high temperature in September: 24.5°C

The warmest month (with the highest average high temperature) is July (27.9°C).
The month with the lowest average high temperature is January (1.4°C).

  • Average low temperature in September: 14.1°C

The month with the highest average low temperature is July (18.2°C).
The coldest month (with the lowest average low temperature) is January (-5.2°C).

Average pressure in September - Clarksville, OH
  • Average pressure in September: 1017.1mbar

Months with the highest atmospheric pressure are January and November (1020.7mbar).
The month with the lowest atmospheric pressure is June (1013.9mbar).

Average wind speed in September - Clarksville, OH
  • Average wind speed in September: 10km/h

The windiest month (with the highest average wind speed) is January (15.7km/h).
The calmest month (with the lowest average wind speed) is August (8.9km/h).

Average humidity in September - Clarksville, OH
  • Average humidity in September: 77%

Months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is October (75%).

Average rainfall in September - Clarksville, OH
  • Average rainfall in September: 22mm

The wettest month (with the highest rainfall) is July (47mm).
The driest month (with the least rainfall) is September (22mm).

Average rainfall days in September - Clarksville, OH
  • Average rainfall days in September: 11 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in September - Clarksville, OH
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (34mm).
Months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days in September - Clarksville, OH
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (9.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Clarksville, OH
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 8.2h

Months with the most sunshine are June and August (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3.7h).

Average sunshine days in September - Clarksville, OH
  • Average sunshine days in September: 16.7 days

Months with the most sunshine days are October and November (19 days).
The month with the least sunshine days is July (11.1 days).

Average UV index in September - Clarksville, OH
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September - Clarksville, OH
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in September - Clarksville, OH
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).