Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September brings an average high-temperature of a still tropical 87.6°F (30.9°C), subtly diverging from August's 91.6°F (33.1°C). September's nights in McLain observe an average temperature of 69.6°F (20.9°C).Heat index
The heat index value during September is evaluated at a very hot 102.2°F (39°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
In September, the average relative humidity is 76%.Rainfall
In McLain, in September, it is raining for 18.1 days, with typically 2.72" (69mm) of accumulated precipitation. Throughout the year, there are 172.4 rainfall days, and 32.48" (825mm) of precipitation is accumulated.Snowfall
February through November are months without snowfall.Daylight
The average length of the day in September in McLain, Mississippi, is 12h and 20min.On the first day of September in McLain, Mississippi, sunrise is at 6:31 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
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 ordinary person.Note: An average UV index of 5 in September transforms into this advice:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in McLain in September?
What is the average humidity in September in McLain?
How much does it rain in McLain in September?
When it does not snow in McLain?
What is the average length of the day in September in McLain?
When is the sunrise / sunset in September in McLain?
How many hours of sunshine does McLain have in September?
What is the UV index reading in September in McLain?
Average temperature in September
McLain, MS
- Average high temperature in September: 87.6°F
The warmest months (with the highest average high temperature) are July and August (91.6°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in September: 69.6°F
The month with the highest average low temperature is August (74.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
McLain, MS
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
McLain, MS
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.2mph).
Average humidity in September
McLain, MS
- Average humidity in September: 76%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
McLain, MS
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is August (4.57").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days in September
McLain, MS
- Average rainfall days in September: 18.1 days
The month with the highest number of rainy days is July (23.6 days).
The month with the least rainy days is November (7.9 days).
Average snowfall in September
McLain, MS
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
McLain, MS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
McLain, MS
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
McLain, MS
- Average sunshine days in September: 10.2 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (5.1 days).
Average UV index in September
McLain, MS
- Average UV index in September: 5
The months with the highest UV index are May, 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
McLain, MS
- Average cloud cover in September: 29
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
McLain, MS
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, September and December (5mi).
McLain, Mississippi, USA
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