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
September
Weather in September
Temperature
The shift into September uncovers an average high-temperature of a still tropical 86.9°F (30.5°C), subtly different from the previous month. In Opp, September nights cool down to an average of 68.9°F (20.5°C).Heat index
Throughout September, the heat index is appraised at a torrid 98.6°F (37°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.The metrics for the heat index are tailored for both shady environments and light winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
In Opp, the average relative humidity in September is 74%.Rainfall
In Opp, during September, the rain falls for 17.2 days and regularly aggregates up to 2.64" (67mm) of precipitation. Throughout the year, there are 178.2 rainfall days, and 36.1" (917mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
In September, the average length of the day in Opp is 12h and 20min.On the first day of September, sunrise is at 6:21 am and sunset at 7:08 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:30 pm CDT.
Sunshine
The average sunshine in September is 9h.UV index
In Opp, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 translates into these guidelines:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow in Opp?
How many hours of daylight does Opp have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Opp have in September?
What is the UV index reading in September?
Average temperature in September
Opp, AL
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is January (57.9°F).
- Average low temperature in September: 68.9°F
The months with the highest average low temperature are July and August (73°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in September
Opp, 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
Opp, AL
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Opp, AL
- Average humidity in September: 74%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Opp, AL
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is August (4.84").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days in September
Opp, AL
- Average rainfall days in September: 17.2 days
The month with the highest number of rainy days is July (24.8 days).
The month with the least rainy days is November (8 days).
Average snowfall in September
Opp, AL
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.16").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Opp, 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 April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Opp, 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 12min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 18min).
Average sunshine days in September
Opp, AL
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (4.4 days).
Average UV index in September
Opp, 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
Opp, AL
- Average cloud cover in September: 29
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Opp, 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).