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
In September, the average high-temperature registers at a still hot 86.9°F (30.5°C), nearly identical to August's 90.3°F (32.4°C). Grand Bay experiences a nighttime temperature average of 73.9°F (23.3°C) during September.Heat index
September's average heat index is appraised at a fiery hot 98.6°F (37°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.Heat index determinations are made taking into account the shade and light air movements. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
In September, the average relative humidity in Grand Bay, Alabama, is 74%.Rainfall
In Grand Bay, during September, the rain falls for 17.9 days and regularly aggregates up to 3.94" (100mm) of precipitation. Throughout the year, there are 173.5 rainfall days, and 40.98" (1041mm) of precipitation is accumulated.Snowfall
In Grand Bay, Alabama, snow does not fall in February through December.Daylight
In Grand Bay, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:39 pm CDT.
Sunshine
In September, the average sunshine is 9.8h.UV index
The average daily maximum UV index in September in Grand Bay is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
How hot is September in Grand Bay?
What is the average humidity in September in Grand Bay?
How much does it rain in Grand Bay in September?
When it does not snow in Grand Bay?
What is the average length of the day in September in Grand Bay?
When is the sunrise / sunset in September in Grand Bay?
How many hours of sunshine does Grand Bay have in September?
What is the UV index reading in September in Grand Bay?
Average temperature in September
Grand Bay, AL
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is January (59.2°F).
- Average low temperature in September: 73.9°F
The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).
Average pressure in September
Grand Bay, 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
Grand Bay, AL
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are January and April (8.1mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in September
Grand Bay, AL
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Grand Bay, AL
- Average rainfall in September: 3.94"
The wettest month (with the highest rainfall) is August (6.1").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in September
Grand Bay, AL
- Average rainfall days in September: 17.9 days
The month with the highest number of rainy days is July (24.1 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in September
Grand Bay, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.16").
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
Grand Bay, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Grand Bay, AL
- 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 5min
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 18min).
Average sunshine days in September
Grand Bay, AL
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is July (5.1 days).
Average UV index in September
Grand Bay, 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 December (UV index 3).
Average cloud cover in September
Grand Bay, AL
- Average cloud cover in September: 25
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 23).
Average visibility in September
Grand Bay, 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).
Grand Bay, Alabama, USA
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