September weather forecastHarriet, AR
September
Weather in September
September, the first month of the autumn in Harriet, is still a warm month, with temperature in the range of an average low of 60.4°F (15.8°C) and an average high of 82.4°F (28°C).Temperature
Harriet records a mild change in average high-temperature during September, easing from a tropical 89.8°F (32.1°C) in August to a moderately hot 82.4°F (28°C). Harriet, amid September nights, sees a noteworthy disparity from daily highs with an average temperature of 60.4°F (15.8°C).Heat index
The average heat index in September is computed to be a hot 87.8°F (31°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', arises from combining readings of air temperature and relative moisture content. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In September, the average relative humidity in Harriet is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 2.01" (51mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Harriet, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:37 pm. On the last day of September, in Harriet, sunrise is at 7:04 am and sunset at 6:54 pm CDT.
Sunshine
In Harriet, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September in Harriet is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 5 suggests these recommendations:
Adopt protective measures - It is advised to guard against sun damage. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harriet, AR
- Average high temperature in September: 82.4°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in September: 60.4°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure in September
Harriet, AR
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Harriet, AR
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are February, March and April (7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in September
Harriet, AR
- Average humidity in September: 74%
The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are August and October (73%).
Average rainfall in September
Harriet, AR
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Harriet, AR
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Harriet, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Harriet, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Harriet, AR
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 12min
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 6min).
Average sunshine days in September
Harriet, AR
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in September
Harriet, AR
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Harriet, AR
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Harriet, AR
- Average visibility in September: 5mi
The months with the highest visibility are January, February, June, October, November and December (6mi).
The months with the lowest visibility are March, April, May, July, August and September (5mi).
