September weather forecastMcWilliams, AL
September
Weather in September
The first month of the autumn, September, is still a hot month in McWilliams, Alabama, with an average temperature varying between 88.3°F (31.3°C) and 67.5°F (19.7°C).Temperature
McWilliams's weather in September displays an average high-temperature of a still hot 88.3°F (31.3°C), showing minor disparity from August's 92.7°F (33.7°C). McWilliams experiences an average low-temperature reading of 67.5°F (19.7°C) throughout September.Heat index
In September, the average heat index is calculated to be a torrid 102.2°F (39°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.Heat index data is primarily for areas with shade and subjected to light winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', represents the fusion of temperature and moisture in the air to suggest how warm it feels. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.
Humidity
In September, the average relative humidity is 73%.Rainfall
In September, the rain falls for 15.7 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. In McWilliams, Alabama, during the entire year, the rain falls for 171.5 days and collects up to 35.47" (901mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:11 pm. On the last day of September, in McWilliams, sunrise is at 6:42 am and sunset at 6:34 pm CDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
McWilliams, AL
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (55.9°F).
- Average low temperature in September: 67.5°F
The months with the highest average low temperature are July and August (72.1°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).
Average pressure in September
McWilliams, AL
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
McWilliams, AL
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is February (6.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in September
McWilliams, AL
- Average humidity in September: 73%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
McWilliams, AL
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is November (1.93").
Average rainfall days in September
McWilliams, AL
- Average rainfall days in September: 15.7 days
The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (8.3 days).
Average snowfall in September
McWilliams, AL
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
McWilliams, AL
- 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 and October (0 days).
Average daylight in September /
Average sunshine in September
McWilliams, AL
- 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: 8h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
McWilliams, AL
- Average sunshine days in September: 12.7 days
The months with the most sunshine days are October and November (20.5 days).
The month with the least sunshine days is July (6.6 days).
Average UV index in September
McWilliams, AL
- 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
McWilliams, AL
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 31).
Average visibility in September
McWilliams, AL
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, October and November (6mi).
The months with the lowest visibility are May, July, August, September and December (5mi).
