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 beginning of September records an average high-temperature of a still tropical 87.3°F (30.7°C), marking a negligible difference from August's 90.5°F (32.5°C). During September, Semmes experiences a consistent low-temperature average of 72.5°F (22.5°C).Heat index
The heat index value for September is estimated at a torrid 100.4°F (38°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.The metrics for the heat index are tailored for both shady environments and light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.
Humidity
The average relative humidity in September is 74%.Rainfall
In Semmes, during September, the rain falls for 18.8 days and regularly aggregates up to 3.03" (77mm) of precipitation. In Semmes, during the entire year, the rain falls for 168.3 days and collects up to 30.28" (769mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:29 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:39 pm CDT.
Sunshine
In Semmes, the average sunshine in September is 9.7h.UV index
In Semmes, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Semmes have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September in Semmes?
Average temperature in September
Semmes, AL
- Average high temperature in September: 87.3°F
The warmest months (with the highest average high temperature) are July and August (90.5°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 72.5°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (43.9°F).
Average pressure in September
Semmes, 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
Semmes, AL
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are January, February, March, April and December (7.3mph).
The calmest month (with the lowest average wind speed) is July (5.1mph).
Average humidity in September
Semmes, 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
Semmes, AL
- Average rainfall in September: 3.03"
The wettest month (with the highest rainfall) is August (4.92").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in September
Semmes, AL
- Average rainfall days in September: 18.8 days
The month with the highest number of rainy days is July (24.6 days).
The month with the least rainy days is November (7.2 days).
Average snowfall in September
Semmes, 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
Semmes, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 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
Semmes, 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 4min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The months with the least sunshine are February and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Semmes, AL
- Average sunshine days in September: 9.3 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (4.8 days).
Average UV index in September
Semmes, AL
- Average UV index in September: 6
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
Semmes, AL
- Average cloud cover in September: 26
The months with the most cloud cover are February and December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 23).
Average visibility in September
Semmes, 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).
Semmes, Alabama, USA
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