September weather forecast and climate
Urbana, AR

Weather in September

September, the first month of the autumn, in Urbana, is still a hot month, with average temperature ranging between max 87.3°F (30.7°C) and min 65.8°F (18.8°C).

Temperature

In September, the average high-temperature marginally drops, from a tropical 93.4°F (34.1°C) in August, to a still hot 87.3°F (30.7°C). In Urbana, the average low-temperature is 65.8°F (18.8°C).

Heat index

The average heat index in September is calculated to a very hot 98.8°F (37.1°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With the 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 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like pregnancy, metabolic differences, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

Months with the lowest humidity are July through October, with an average relative humidity of 71%.

Rainfall

In September, the rain falls for 12.5 days. Throughout September, 2.36" (60mm) of precipitation is accumulated. In Urbana, during the entire year, the rain falls for 146.4 days and collects up to 32.87" (835mm) of precipitation.

Snowfall

April through November are months without snowfall in Urbana.

Daylight

In Urbana, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 9.5h.

UV index

The average daily maximum UV index in Urbana, Arkansas, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Urbana?

In Urbana, in September, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 65.8°F (18.8°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that calculates temperature value influenced by the moisture in the air, in September is calculated to 98.8°F (37.1°C).

What is the least humid month in Urbana?

Months with the lowest humidity in Urbana, Arkansas, are July through October, with an average relative humidity of 71%.

What is the average humidity in September in Urbana?

In Urbana, Arkansas, the average relative humidity in September is 71%.

How much does it rain in Urbana in September?

In Urbana, in September, it is raining for 12.5 days, with typically 2.36" (60mm) of accumulated precipitation.

When it does not snow in Urbana?

April through November are months without snowfall in Urbana.

How many hours of daylight does Urbana have in September?

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

How long on average sun shines in September in Urbana?

In September, the average sunshine in Urbana, Arkansas, is 9.5h.

What is the UV index reading in September in Urbana?

In Urbana, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Urbana, AR

Average temperature in September - Urbana, AR
  • Average high temperature in September: 87.3°F

The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is January (52°F).

  • Average low temperature in September: 65.8°F

The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).

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Average pressure in September
Urbana, AR

Average pressure in September - Urbana, AR
  • Average pressure in September: 29.99"

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
Urbana, AR

Average wind speed in September - Urbana, AR
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in September
Urbana, AR

Average humidity in September - Urbana, AR
  • Average humidity in September: 71%

Months with the highest relative humidity are February and December (81%).
Months with the lowest relative humidity are July, August, September and October (71%).

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Average rainfall in September
Urbana, AR

Average rainfall in September - Urbana, AR
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is November (2.05").

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Average rainfall days in September
Urbana, AR

Average rainfall days in September - Urbana, AR
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is August (15.4 days).
The month with the least rainy days is October (9 days).

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Average snowfall in September
Urbana, AR

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

The month with the highest snowfall is February (0.59").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Urbana, AR

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

The month with the highest number of snowfall days is February (1 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is August (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in September
Urbana, AR

Average sunshine days in September - Urbana, AR
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is August (13.6 days).

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Average UV index in September
Urbana, AR

Average UV index in September - Urbana, AR
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Urbana, AR

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

The month with the most cloud cover is February (Cloud cover 50).
Months with the least cloud cover are June, July and August (Cloud cover 28).

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Average visibility in September
Urbana, AR

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

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

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