September weather forecastRussellville, AR
September
Weather in September
September in Russellville signals a soft wave of relief with the advent of fall. A gradual retreat of temperature highs and resurgence of occasional rainfall paint the landscape of weather patterns in this transitional month. Autumnal colors start to peek through accentuated by the continual presence of clear blue skies. Amidst the waning summer heat, the town records a temperature high of 83.8°F (28.8°C) and nights begin to cool off to a comfortable 61.7°F (16.5°C). All the while, the wind remains mild throughout September, providing a pleasant backdrop to the changing seasons.Temperature
Start of September in Russellville brings a slight shift in the average high-temperature, dipping a bit from August's tropical 90.5°F (32.5°C) to a moderately hot 83.8°F (28.8°C). Russellville records a significant temperature drop in September nights, lowering to an average of 61.7°F (16.5°C).Heat index
In September, the average heat index is appraised at a tropical 91.4°F (33°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
In Russellville, Arkansas, the average relative humidity in September is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 12.9 days and accumulates 1.85" (47mm) of precipitation.Snowfall
In Russellville, snow does not fall in April through November.Daylight
The average length of the day in September in Russellville is 12h and 23min.On the first day of September in Russellville, Arkansas, sunrise is at 6:45 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine in Russellville is 9.6h.UV index
In September, the average daily maximum UV index in Russellville is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Russellville, AR
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (47.5°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in September
Russellville, 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
Russellville, AR
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Russellville, AR
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (79%).
The months with the lowest relative humidity are July, August and October (73%).
Average rainfall in September
Russellville, AR
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (4.84").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Russellville, AR
- Average rainfall days in September: 12.9 days
The months with the highest number of rainy days are May and July (16.3 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in September
Russellville, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Russellville, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 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
Russellville, AR
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 24min).
Average sunshine days in September
Russellville, AR
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in September
Russellville, AR
- Average UV index in September: 6
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Russellville, AR
- Average cloud cover in September: 28
The months with the most cloud cover are February and March (Cloud cover 45).
The months with the least cloud cover are June, July and August (Cloud cover 27).
Average visibility in September
Russellville, AR
- Average visibility in September: 6mi
The months with the highest visibility are February, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March, April, May and December (5mi).
