September weather forecastDuncan, MS
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Duncan, Mississippi, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 66.7°F (19.3°C).Temperature
Duncan experiences an average high-temperature of a warm 85.1°F (29.5°C) in September, marking an insignificant shift from 88.9°F (31.6°C) in August. Duncan records an average temperature drop to a comfortable 66.7°F (19.3°C) in September.Heat index
In September, the average heat index is evaluated at a hot 93.2°F (34°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Humidity
In Duncan, the average relative humidity in September is 71%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.42" (36mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:37 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:48 pm CDT.
Sunshine
The average sunshine in September is 9.7h.UV index
In Duncan, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: An average UV index of 5 in September transforms into this advice:
Ensure safety - Recommendations to avert sunburn are presented. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Duncan, MS
- Average high temperature in September: 85.1°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 (50.2°F).
- Average low temperature in September: 66.7°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in September
Duncan, MS
- 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
Duncan, MS
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Duncan, MS
- Average humidity in September: 71%
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
Duncan, MS
- Average rainfall in September: 1.42"
The wettest months (with the highest rainfall) are April and May (3.46").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Duncan, MS
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is October (8.3 days).
Average snowfall in September
Duncan, MS
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.35").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Duncan, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.9 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
Duncan, MS
- 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 42min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Duncan, MS
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is October (21.1 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Duncan, MS
- 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
Duncan, MS
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Duncan, MS
- 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).
