September weather forecastWalnut Ridge, AR
September
Weather in September
September is a transition month in Walnut Ridge as summer gives way to fall. This shift is observed in the drop in temperatures and change in atmospheric conditions. Interestingly, September experiences the lowest rainfall of 2.2in in the second half of the year, marking the transition between seasons. The landscape responds to these changes with trees manifesting a mix of summer green and the telltale fall colors. As the humidity decreases from August to September, it allows residents to immerse themselves in the outdoors, enjoying the mild weather that falls between the extremes of summer heat and winter chill.Temperature
In Walnut Ridge, the average high-temperature in September gently drops from a tropical 87.8°F (31°C) in August to a warm 82°F (27.8°C). Walnut Ridge witnesses a consistent average low-temperature of 63.7°F (17.6°C) throughout September.Heat index
For most parts of September, the heat index is calculated to be a hot 87.8°F (31°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
In September, the average relative humidity in Walnut Ridge is 72%.Rainfall
September is the month with the least rainfall in Walnut Ridge. Rain falls for 11 days and accumulates 2.2" (56mm) of precipitation.Snowfall
April through September are months without snowfall in Walnut Ridge.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:48 pm CDT.
Sunshine
The average sunshine in September in Walnut Ridge is 9.6h.UV index
In September, the average daily maximum UV index in Walnut Ridge is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 suggests this advice:
Heed the precautions - Suggestions to avoid sunburn are made. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Walnut Ridge, AR
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Walnut Ridge, 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 (29.93"Hg).
Average wind speed in September
Walnut Ridge, AR
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is February (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Walnut Ridge, 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 (67%).
Average rainfall in September
Walnut Ridge, AR
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is April (4.61").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in September
Walnut Ridge, AR
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in September
Walnut Ridge, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.18").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Walnut Ridge, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Walnut Ridge, 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 36min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Walnut Ridge, AR
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is October (19.8 days).
The months with the least sunshine days are April and May (13.8 days).
Average UV index in September
Walnut Ridge, AR
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Walnut Ridge, AR
- Average cloud cover in September: 28
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in September
Walnut Ridge, 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).
