September weather forecastMobile, AL
September
Weather in September
September signals the transition from summer to autumn in Mobile, Alabama. Temperatures begin to recede, peaking around 87.3°F (30.7°C). September enjoys long daylight hours, despite the minor drop in temperatures. The rainfall also decreases significantly to an average of 3.46" (88mm) over 18 days. Towards the end of September, the weather becomes even milder, and the months leading into winter, such as October and November, are marked by further reductions in temperature and rain.Temperature
With September's arrival, Mobile notes an average high-temperature of a still tropical 87.3°F (30.7°C), closely following the trend of the preceding month. September brings with it a nighttime average temperature of 72.1°F (22.3°C).Heat index
The heat index in September is computed to be a fiery hot 100.4°F (38°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. 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. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
In September, the average relative humidity is 74%.Rainfall
In Mobile, in September, during 17.7 rainfall days, 3.46" (88mm) of precipitation is typically accumulated. In Mobile, Alabama, during the entire year, the rain falls for 173.3 days and collects up to 39.33" (999mm) of precipitation.Snowfall
In Mobile, snow does not fall in February through December.Daylight
In Mobile, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:38 pm CDT.
Sunshine
In Mobile, the average sunshine in September is 9.7h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mobile, AL
- Average high temperature in September: 87.3°F
The warmest months (with the highest average high temperature) are July and August (90.9°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 72.1°F
The month with the highest average low temperature is August (76.5°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in September
Mobile, AL
- Average pressure in September: 29.98"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
Mobile, AL
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are January and April (7.4mph).
The calmest month (with the lowest average wind speed) is July (5.2mph).
Average humidity in September
Mobile, AL
- Average humidity in September: 74%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Mobile, AL
- Average rainfall in September: 3.46"
The wettest month (with the highest rainfall) is August (5.55").
The driest month (with the least rainfall) is November (2.05").
Average rainfall days in September
Mobile, AL
- Average rainfall days in September: 17.7 days
The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is November (8.4 days).
Average snowfall in September
Mobile, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Mobile, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Mobile, AL
- Average daylight in September: 12h and 18min
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 42min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Mobile, AL
- Average sunshine days in September: 10.7 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (5.4 days).
Average UV index in September
Mobile, AL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Mobile, AL
- Average cloud cover in September: 26
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in September
Mobile, AL
- 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).
