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 hot 88°F (31.1°C), almost echoing the conditions of the previous month. Old Salem's nighttime temperature in September falls to an average of 68°F (20°C).Heat index
In September, the average heat index is estimated at a torrid 102.2°F (39°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.In reference to the heat index, it's for places in shade and with a slight wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. 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 are particularly important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. 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. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
In September, the average relative humidity is 75%.Rainfall
In Old Salem, in September, during 17 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. Throughout the year, in Old Salem, there are 174.1 rainfall days, and 36.02" (915mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall in Old Salem.Daylight
The average length of the day in September in Old Salem is 12h and 21min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:12 pm. On the last day of September, in Old Salem, sunrise is at 6:43 am and sunset at 6:35 pm CDT.
Sunshine
In Old Salem, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Old Salem is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: During September, 6 as the daily maximum UV index converts into the following advice:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
How hot does it get in Old Salem in September?
What is the average humidity in September in Old Salem?
How many days does it rain in September in Old Salem?
When it does not snow in Old Salem?
How many hours of daylight does Old Salem have in September?
When is the sunrise / sunset in September in Old Salem?
How long on average sun shines in September in Old Salem?
What is the UV index reading in September in Old Salem?
Average temperature in September
Old Salem, AL
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is July (92.3°F).
The month with the lowest average high temperature is January (56.8°F).
- Average low temperature in September: 68°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
Old Salem, 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
Old Salem, AL
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are February, March and April (6.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).
Average humidity in September
Old Salem, AL
- Average humidity in September: 75%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Old Salem, AL
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is August (4.49").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in September
Old Salem, AL
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is July (23.3 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in September
Old Salem, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Old Salem, AL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.4 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
Old Salem, AL
- Average daylight in September: 12h and 2min
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 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Old Salem, AL
- Average sunshine days in September: 11.3 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (5.4 days).
Average UV index in September
Old Salem, 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, November and December (UV index 3).
Average cloud cover in September
Old Salem, AL
- Average cloud cover in September: 33
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 31).
Average visibility in September
Old Salem, AL
- Average visibility in September: 5mi
The months with the highest visibility are June and October (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September, November and December (5mi).
Old Salem, Alabama, USA
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