Clinton
Oklahoma, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Clinton, OK

The first month of the autumn, September, is still a tropical month in Clinton, Oklahoma, with average temperature fluctuating between 88°F (31.1°C) and 60.1°F (15.6°C).

Temperature

In September, the average high-temperature slightly decreases, from a torrid 96.1°F (35.6°C) in August, to a hot 88°F (31.1°C). In Clinton, Oklahoma, in September, the average low-temperature is 60.1°F (15.6°C).

Heat index

The average heat index in September is evaluated at a very hot 97.5°F (36.4°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, clothing, pregnancy), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September is 65%.

Rainfall

In Clinton, during September, the rain falls for 3.7 days and regularly aggregates up to 2.1" (53.3mm) of precipitation. Throughout the year, in Clinton, Oklahoma, there are 51.9 rainfall days, and 26.7" (677.9mm) of precipitation is accumulated.

Snowfall

Throughout the year, in Clinton, Oklahoma, 10" (254mm) of snow is accumulated.

Daylight

The average length of the day in September in Clinton, Oklahoma, is 12.4h.

What is the temperature in September in Clinton?

In September, the average high-temperature is 88°F (31.1°C), and the average low-temperature is 60.1°F (15.6°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, is appraised at 97.5°F (36.4°C).

What is the average humidity in September in Clinton?

The average relative humidity in September in Clinton is 65%.

How many days does it rain in September in Clinton?

In Clinton, Oklahoma, during September, the rain falls for 3.7 days and regularly aggregates up to 2.1" (53.3mm) of precipitation.

How many hours of daylight does Clinton have in September?

In Clinton, the average length of the day in September is 12.4h.
Average temperature in September - Clinton, OK
  • Average high temperature in September: 88°F

The warmest month (with the highest average high temperature) is August (96°F).
The month with the lowest average high temperature is January (50°F).

  • Average low temperature in September: 60°F

The month with the highest average low temperature is July (69°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average humidity in September - Clinton, OK
  • Average humidity in September: 65%

The month with the highest relative humidity is December (67%).
The month with the lowest relative humidity is April (55%).

Average rainfall in September - Clinton, OK
  • Average rainfall in September: 2.1"

The wettest month (with the highest rainfall) is May (5.1").
Driest months (with the lowest rainfall) are January, February and November (1").

Average rainfall days in September - Clinton, OK
  • Average rainfall days in September: 3.7 days

The month with the highest number of rainy days is May (7.2 days).
The month with the lowest number of rainy days is November (2.3 days).

Average snowfall in September - Clinton, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.3").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average daylight in September - Clinton, OK
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).