Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the arrival of September, Landmark notices a mild change in the average high-temperature, sliding from August's tropical 91°F (32.8°C) to a moderately hot 85.3°F (29.6°C). Landmark's September nights cool down to an average low-temperature of 64.9°F (18.3°C).Heat index
September's mean heat index is estimated at a fiery hot 95°F (35°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.When assessing, remember that heat index measurements are for light winds and shaded spots. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. 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. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
In September, the average relative humidity is 72%.Rainfall
In Landmark, in September, it is raining for 13 days, with typically 2.68" (68mm) of accumulated precipitation. In Landmark, during the entire year, the rain falls for 158.1 days and collects up to 38.03" (966mm) of precipitation.Snowfall
In Landmark, snow does not fall in April through October.Daylight
The average length of the day in September in Landmark, Arkansas, is 12h and 23min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:54 pm CDT.
Sunshine
In Landmark, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.Note: A typical high UV index of 6 in September suggests the following recommendations:
Deflect overexposure. Sun protection is a necessity. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Frequently asked questions
Is it hot in Landmark during September?
What is the average humidity in September in Landmark?
How much does it rain in Landmark in September?
When it does not snow in Landmark?
What is the average length of the day in September in Landmark?
When are sunrise and sunset in September in Landmark?
How many hours of sunshine does Landmark have in September?
What is the UV index reading in September in Landmark?
Average temperature in September
Landmark, AR
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (48.9°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (34.2°F).
Average pressure in September
Landmark, AR
- Average pressure in September: 30.01"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
Landmark, AR
- Average wind speed in September: 5.3mph
The windiest months (with the highest average wind speed) are February, March and April (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Landmark, AR
- Average humidity in September: 72%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Landmark, AR
- Average rainfall in September: 2.68"
The wettest month (with the highest rainfall) is April (4.53").
The driest month (with the least rainfall) is January (2.52").
Average rainfall days in September
Landmark, AR
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Landmark, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Landmark, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 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
Landmark, 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 June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in September
Landmark, AR
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Landmark, AR
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Landmark, AR
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Landmark, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Landmark, Arkansas, USA
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