September weather forecast and climate
Parthenon, AR

Weather in September

September, the first month of the autumn, in Parthenon, is also a moderately hot month, with average temperature varying between 59.7°F (15.4°C) and 81.1°F (27.3°C).

Temperature

In September, the average high-temperature slightly decreases, from a tropical 88°F (31.1°C) in August, to a moderately hot 81.1°F (27.3°C). The average low-temperature, in Parthenon, is 59.7°F (15.4°C).

Heat index

The average heat index in September is calculated to 85.8°F (29.9°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
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 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', 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 especially crucial for babies and toddlers. 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.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In September, the rain falls for 13.5 days. Throughout September, 2.09" (53mm) of precipitation is accumulated. Throughout the year, in Parthenon, there are 145.6 rainfall days, and 31.89" (810mm) of precipitation is accumulated.

Snowfall

In Parthenon snow does not fall in June through October.

Daylight

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

Sunshine

In September, the average sunshine is 9.2h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the temperature in September in Parthenon?

In September, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 59.7°F (15.4°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, in September is calculated to 85.8°F (29.9°C).

What is the average humidity in September in Parthenon?

The average relative humidity in September in Parthenon is 75%.

How much does it rain in Parthenon in September?

In Parthenon, during September, the rain falls for 13.5 days and regularly aggregates up to 2.09" (53mm) of precipitation.

When it does not snow in Parthenon?

June through October are months without snowfall in Parthenon.

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

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

How long on average sun shines in September in Parthenon?

In September, the average sunshine is 9.2h.

What is the UV index reading in September in Parthenon?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Parthenon, AR

Average temperature in September - Parthenon, AR
  • Average high temperature in September: 81.1°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in September: 59.7°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).

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Average pressure in September
Parthenon, AR

Average pressure in September - Parthenon, AR
  • Average pressure in September: 30.02"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in September
Parthenon, AR

Average wind speed in September - Parthenon, AR
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in September
Parthenon, AR

Average humidity in September - Parthenon, AR
  • Average humidity in September: 75%

Months with the highest relative humidity are March and May (78%).
Months with the lowest relative humidity are January and October (73%).

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Average rainfall in September
Parthenon, AR

Average rainfall in September - Parthenon, AR
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is May (3.94").
The driest months (with the least rainfall) are January and February (1.97").

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Average rainfall days in September
Parthenon, AR

Average rainfall days in September - Parthenon, AR
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is December (7.5 days).

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Average snowfall in September
Parthenon, AR

Average snowfall in September - Parthenon, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.36").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Parthenon, AR

Average snowfall days in September - Parthenon, AR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.2 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Parthenon, AR

Average daylight in September / Average sunshine in September - Parthenon, AR
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 9.2h

The month with the most sunshine is June (Average sunshine: 10.8h).
Months with the least sunshine are January and February (Average sunshine: 5.5).

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Average sunshine days in September
Parthenon, AR

Average sunshine days in September - Parthenon, AR
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is December (21.3 days).
The month with the least sunshine days is July (11.4 days).

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Average UV index in September
Parthenon, AR

Average UV index in September - Parthenon, AR
  • Average UV index in September: 5

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

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Average cloud cover in September
Parthenon, AR

Average cloud cover in September - Parthenon, AR
  • Average cloud cover in September: 30

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 27).

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Average visibility in September
Parthenon, AR

Average visibility in September - Parthenon, AR
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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