September weather forecast
Griffithtown, AR

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Weather in September

The first month of the autumn, September, is still a hot month in Griffithtown, Arkansas, with an average temperature ranging between max 86.7°F (30.4°C) and min 64.9°F (18.3°C).

Temperature

The start of September signals a gentle decrease in the average high-temperature, transitioning from a tropical 92.8°F (33.8°C) in August to a still hot 86.7°F (30.4°C). September nights in Griffithtown are characterized by a notable drop from daytime highs, with an average low-temperature of 64.9°F (18.3°C).

Heat index

The average heat index in September is calculated to be a very hot 96.8°F (36°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

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

Rainfall

The month with the least rainfall in Griffithtown is September, when the rain falls for 10.6 days and typically collects 1.14" (29mm) of precipitation.

Snowfall

March through December are months without snowfall.

Daylight

The average length of the day in September is 12h and 22min.
On the first day of September, 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 6:57 pm CDT.

Sunshine

In Griffithtown, the average sunshine in September is 9.5h.

UV index

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. 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. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

The high-temperature during September is 86.7°F (30.4°C) and the low-temperature is 64.9°F (18.3°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is calculated to be 96.8°F (36°C).

What is the least humid month?

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

What is the average humidity in September?

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

What is the driest month in Griffithtown?

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

How much 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 Griffithtown have in September?

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

When are sunrise and sunset in September?

On the first day of September, 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 6:57 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9.5h.

What is the UV index intensity in September in Griffithtown?

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from 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
Griffithtown, AR

Average temperature in September - Griffithtown, 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
Griffithtown, AR

Average pressure in September - Griffithtown, 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
Griffithtown, AR

Average wind speed in September - Griffithtown, 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
Griffithtown, AR

Average humidity in September - Griffithtown, 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
Griffithtown, AR

Average rainfall in September - Griffithtown, 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
Griffithtown, AR

Average rainfall days in September - Griffithtown, 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
Griffithtown, AR

Average snowfall in September - Griffithtown, 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
Griffithtown, AR

Average snowfall days in September - Griffithtown, 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
Griffithtown, AR

Average daylight in September / Average sunshine in September - Griffithtown, 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
Griffithtown, AR

Average sunshine days in September - Griffithtown, 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
Griffithtown, AR

Average UV index in September - Griffithtown, 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
Griffithtown, AR

Average cloud cover in September - Griffithtown, 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
Griffithtown, AR

Average visibility in September - Griffithtown, 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).

Griffithtown, Arkansas, USA

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