September weather forecastGreenwood, LA
September
Weather in September
September, the first month of the autumn in Greenwood, is also a hot month, with temperature in the range of an average low of 67.8°F (19.9°C) and an average high of 88.9°F (31.6°C).Temperature
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a very hot 95.2°F (35.1°C) in August to a tropical 88.9°F (31.6°C). During September, Greenwood records a consistent average nighttime temperature of 67.8°F (19.9°C).Heat index
Throughout September, the heat index is appraised at a torrid 102.2°F (39°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
The average relative humidity in September is 69%.Rainfall
In Greenwood, during September, the rain falls for 14.5 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, there are 161.5 rainfall days, and 39.13" (994mm) of precipitation is accumulated.Snowfall
January through March, September, November and December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Greenwood, during the entire year, snow falls for 3.4 days and aggregates up to 1.61" (41mm) of snow.Daylight
In Greenwood, Louisiana, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:39 pm. On the last day of September, in Greenwood, sunrise is at 7:09 am and sunset at 7:01 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In Greenwood, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenwood, LA
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (54.3°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is July (73.8°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).
Average pressure in September
Greenwood, LA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Greenwood, LA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest months (with the lowest average wind speed) are August and September (5.2mph).
Average humidity in September
Greenwood, LA
- Average humidity in September: 69%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Greenwood, LA
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is July (2.52").
Average rainfall days in September
Greenwood, LA
- Average rainfall days in September: 14.5 days
The months with the highest number of rainy days are March and August (15.8 days).
The month with the least rainy days is October (9.9 days).
Average snowfall in September
Greenwood, LA
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in September
Greenwood, LA
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and February (1.1 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Greenwood, LA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 24min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Greenwood, LA
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is October (19.2 days).
The months with the least sunshine days are February and June (12.8 days).
Average UV index in September
Greenwood, LA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Greenwood, LA
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in September
Greenwood, LA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
