September weather forecast
Gravel Junction, AR

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Weather in September

September, the first month of the autumn in Gravel Junction, is still a tropical month, with an average temperature varying between 86.7°F (30.4°C) and 64.9°F (18.3°C).

Temperature

September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a hot 92.8°F (33.8°C) in August to a still tropical 86.7°F (30.4°C). Gravel Junction notes a substantial temperature decline from the daytime peaks throughout September, with an average nighttime temperature of 64.9°F (18.3°C).

Heat index

September's average heat index is evaluated at a torrid 96.8°F (36°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

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 10.6 days and accumulates 1.14" (29mm) of precipitation.

Snowfall

March through December are months without snowfall.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of the month, sunrise is at 6:45 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:56 pm CDT.

Sunshine

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

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 6 during September translates into the following guidance:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

An average high-temperature, in September, in Gravel Junction, is 86.7°F (30.4°C) and the average low-temperature is 64.9°F (18.3°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is evaluated at 96.8°F (36°C).

What are the least humid months?

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

What is the average humidity in September in Gravel Junction?

In Gravel Junction, the average relative humidity in September is 71%.

What is the driest month?

September is the month with the least rainfall in Gravel Junction. Rain falls for 10.6 days and accumulates 1.14" (29mm) of precipitation.

How many days does it rain in September?

In September, the rain falls for 10.6 days. Throughout September, 1.14" (29mm) of precipitation is accumulated.

When it does not snow?

March through December are months without snowfall.

How many hours of daylight does Gravel Junction have in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:45 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:56 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.5h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health 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
Gravel Junction, AR

Average temperature in September - Gravel Junction, AR
  • Average high temperature in September: 86.7°F

The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (50.5°F).

  • Average low temperature in September: 64.9°F

The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

Average pressure in September
Gravel Junction, AR

Average pressure in September - Gravel Junction, 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
Gravel Junction, AR

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

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in September
Gravel Junction, AR

Average humidity in September - Gravel Junction, 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
Gravel Junction, AR

Average rainfall in September - Gravel Junction, AR
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is April (2.52").
The driest month (with the least rainfall) is September (1.14").

Average rainfall days in September
Gravel Junction, AR

Average rainfall days in September - Gravel Junction, AR
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is August (14.3 days).
The month with the least rainy days is October (7.9 days).

Average snowfall in September
Gravel Junction, AR

Average snowfall in September - Gravel Junction, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.43").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September
Gravel Junction, AR

Average snowfall days in September - Gravel Junction, AR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Gravel Junction, AR

Average daylight in September / Average sunshine in September - Gravel Junction, 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 30min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in September
Gravel Junction, AR

Average sunshine days in September - Gravel Junction, AR
  • Average sunshine days in September: 17 days

The month with the most sunshine days is October (21.8 days).
The month with the least sunshine days is August (13.8 days).

Average UV index in September
Gravel Junction, AR

Average UV index in September - Gravel Junction, AR
  • Average UV index in September: 6

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
Gravel Junction, AR

Average cloud cover in September - Gravel Junction, AR
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 28).

Average visibility in September
Gravel Junction, AR

Average visibility in September - Gravel Junction, AR
  • Average visibility in September: 6mi

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

Gravel Junction, Arkansas, USA

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