September weather forecast and climate
West Helena, AR

Weather in September

The first month of the autumn, September, is also a moderately hot month in West Helena, Arkansas, with average temperature fluctuating between 84.4°F (29.1°C) and 66.2°F (19°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a warm 84.4°F (29.1°C). The average low-temperature, in September, is 66.2°F (19°C).

Heat index

In September, the average heat index is estimated at a tropical 91.9°F (33.3°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, differences in body mass, height, and shape, wind, and pregnancy affect individual temperature impact. 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.

Humidity

The average relative humidity in West Helena, Arkansas, is 72%.

Rainfall

The month with the least rainfall in West Helena is September when the rain falls for 9.6 days and typically collects 0.67" (17mm) of precipitation.

Snowfall

In West Helena snow does not fall in March through November.

Daylight

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

Sunshine

The average sunshine in West Helena is 9.7h.

UV index

In West Helena, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
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. 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 West Helena?

In West Helena, in September, the average high-temperature is 84.4°F (29.1°C), and the average low-temperature is 66.2°F (19°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, in September is appraised at 91.9°F (33.3°C).

What is the average humidity in September in West Helena?

In September, the average relative humidity in West Helena is 72%.

How much does it rain in West Helena in September?

In West Helena, Arkansas, in September, it is raining for 9.6 days, with typically 0.67" (17mm) of accumulated precipitation.

What is the driest month in West Helena?

The month with the least rainfall in West Helena is September when the rain falls for 9.6 days and typically collects 0.67" (17mm) of precipitation.

When it does not snow in West Helena?

March through November are months without snowfall in West Helena.

What is the average length of the day in September in West Helena?

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

How many hours of sunshine does West Helena have in September?

In West Helena, Arkansas, the average sunshine in September is 9.7h.

What is the UV index reading in September in West Helena?

In September, the average daily maximum UV index in West Helena is 5. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in September
West Helena, AR

Average temperature in September - West Helena, AR
  • Average high temperature in September: 84.4°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 (48°F).

  • Average low temperature in September: 66.2°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).

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Average pressure in September
West Helena, AR

Average pressure in September - West Helena, AR
  • Average pressure in September: 30"

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
West Helena, AR

Average wind speed in September - West Helena, AR
  • Average wind speed in September: 5.8mph

The windiest month (with the highest average wind speed) is February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
West Helena, AR

Average humidity in September - West Helena, AR
  • Average humidity in September: 72%

Months with the highest relative humidity are March and December (78%).
The month with the lowest relative humidity is October (67%).

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Average rainfall in September
West Helena, AR

Average rainfall in September - West Helena, AR
  • Average rainfall in September: 0.67"

The wettest month (with the highest rainfall) is April (1.89").
The driest month (with the least rainfall) is September (0.67").

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Average rainfall days in September
West Helena, AR

Average rainfall days in September - West Helena, AR
  • Average rainfall days in September: 9.6 days

The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is November (6.7 days).

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Average snowfall in September
West Helena, AR

Average snowfall in September - West Helena, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.28").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
West Helena, AR

Average snowfall days in September - West Helena, AR
  • Average snowfall days in September: 0 days

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

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Average daylight in September /
Average sunshine in September
West Helena, AR

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

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9.7h

The month with the most sunshine is June (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in September
West Helena, AR

Average sunshine days in September - West Helena, AR
  • Average sunshine days in September: 17.3 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in September
West Helena, AR

Average UV index in September - West Helena, AR
  • Average UV index in September: 5

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in September
West Helena, AR

Average cloud cover in September - West Helena, AR
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 25).

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Average visibility in September
West Helena, AR

Average visibility in September - West Helena, AR
  • Average visibility in September: 6mi

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

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