September weather forecast
Smyrna, AR

Share

Weather in September

September, the first month of the autumn in Smyrna, is still a hot month, with an average temperature varying between 87.3°F (30.7°C) and 65.5°F (18.6°C).

Temperature

In Smyrna, the average high-temperature in September gently drops from 93.2°F (34°C) in August to a still hot 87.3°F (30.7°C). Smyrna encounters a substantial decline from its daily high to a low-temperature of 65.5°F (18.6°C) during September nights.

Heat index

The heat index for September is calculated to be a very hot 98.6°F (37°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial 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.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

July through October, with an average relative humidity of 71%, are the least humid months.

Rainfall

September is the month with the least rainfall. Rain falls for 10.2 days and accumulates 1.26" (32mm) of precipitation.

Snowfall

April through December are months without snowfall.

Daylight

In Smyrna, Arkansas, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 6:47 am and sunset at 7:38 pm. On the last day of September, in Smyrna, sunrise is at 7:07 am and sunset at 6:58 pm CDT.

Sunshine

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

UV index

In September, the average daily maximum UV index in Smyrna is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 5 during September translates into the following guidance:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.

Frequently asked questions

How hot is it in Smyrna in September?

During September, Smyrna experiences an average high-temperature of 87.3°F (30.7°C) and a low-temperature of 65.5°F (18.6°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is calculated to be 98.6°F (37°C).

What is the least humid month in Smyrna?

July through October, with an average relative humidity of 71%, are the least humid months.

What is the average humidity in September in Smyrna?

The average relative humidity in September in Smyrna is 71%.

What is the driest month in Smyrna?

The month with the least rainfall is September, when the rain falls for 10.2 days and typically collects 1.26" (32mm) of precipitation.

How much does it rain in Smyrna in September?

In September, the rain falls for 10.2 days. Throughout September, 1.26" (32mm) of precipitation is accumulated.

When it does not snow in Smyrna?

In Smyrna, Arkansas, snow does not fall in April through December.

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

In Smyrna, Arkansas, the average day length in September is 12h and 22min.

When is the sunrise / sunset in September in Smyrna?

In September, on the first day of the month, sunrise is at 6:47 am and sunset at 7:38 pm. On the last day of the month, in Smyrna, sunrise is at 7:07 am and sunset at 6:58 pm CDT.

How long on average sun shines in September in Smyrna?

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

What is the UV index intensity in September in Smyrna?

The average daily maximum UV index in September in Smyrna, Arkansas, is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Smyrna, AR

Average temperature in September - Smyrna, 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 (51.3°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure in September
Smyrna, AR

Average pressure in September - Smyrna, AR
  • Average pressure in September: 30"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
Smyrna, AR

Average wind speed in September - Smyrna, AR
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in September
Smyrna, AR

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

The months with the highest relative humidity are February, March and December (80%).
The months with the lowest relative humidity are July, August, September and October (71%).

Average rainfall in September
Smyrna, AR

Average rainfall in September - Smyrna, AR
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is April (3.39").
The driest month (with the least rainfall) is September (1.26").

Average rainfall days in September
Smyrna, AR

Average rainfall days in September - Smyrna, AR
  • Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is July (14.2 days).
The month with the least rainy days is October (8.5 days).

Average snowfall in September
Smyrna, AR

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

The month with the highest snowfall is February (0.35").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September
Smyrna, AR

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

The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).

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

Average daylight in September / Average sunshine in September - Smyrna, AR
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 9h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in September
Smyrna, AR

Average sunshine days in September - Smyrna, AR
  • Average sunshine days in September: 17.8 days

The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is August (14.1 days).

Average UV index in September
Smyrna, AR

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

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

Average cloud cover in September
Smyrna, AR

Average cloud cover in September - Smyrna, AR
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June, July, August and September (Cloud cover 28).

Average visibility in September
Smyrna, AR

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

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

Smyrna, Arkansas, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location