September weather forecastMellwood, AR
September
Weather in September
The first month of the autumn, September, is still a warm month in Mellwood, Arkansas, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 84.7°F (29.3°C).Temperature
The transition into September shows a subtle variation to a moderately hot 84.7°F (29.3°C) from August's 88.9°F (31.6°C) in the average high-temperature. In Mellwood, the average temperature during the nights of September drops to a refreshing 66.7°F (19.3°C).Heat index
For September, the heat index is computed to be a hot 93.2°F (34°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humidity
The average relative humidity in September is 72%.Rainfall
The month with the least rainfall is September, when the rain falls for 8.3 days and typically collects 0.35" (9mm) of precipitation.Snowfall
January, March through December are months without snowfall in Mellwood.Daylight
The average length of the day in September is 12h and 22min.On the first day of September in Mellwood, sunrise is at 6:37 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:48 pm CDT.
Sunshine
In Mellwood, the average sunshine in September is 9.9h.UV index
In Mellwood, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 5 in September leads to these guidelines:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mellwood, AR
- Average high temperature in September: 84.7°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (49.5°F).
- Average low temperature in September: 66.7°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).
Average pressure in September
Mellwood, 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 (29.95"Hg).
Average wind speed in September
Mellwood, AR
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is February (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Mellwood, AR
- Average humidity in September: 72%
The months with the highest relative humidity are February, March and December (78%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Mellwood, AR
- Average rainfall in September: 0.35"
The wettest months (with the highest rainfall) are April and July (1.18").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Mellwood, AR
- Average rainfall days in September: 8.3 days
The month with the highest number of rainy days is July (11.9 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Mellwood, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.08").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Mellwood, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mellwood, AR
- Average daylight in September: 12h and 24min
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 54min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Mellwood, AR
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is October (23.4 days).
The month with the least sunshine days is July (15.3 days).
Average UV index in September
Mellwood, 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, February and December (UV index 3).
Average cloud cover in September
Mellwood, AR
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 24).
Average visibility in September
Mellwood, 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).
