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
September is marked by an average high-temperature of a still hot 86.9°F (30.5°C), almost identical to the preceding month. Throughout September, the nighttime temperature averages to a pleasant 69.6°F (20.9°C).Heat index
During September, the heat index is calculated to be a very hot 98.6°F (37°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature 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 highly important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
The average relative humidity in September is 73%.Rainfall
In Napier Field, during September, the rain falls for 13.7 days and regularly aggregates up to 1.38" (35mm) of precipitation. In Napier Field, during the entire year, the rain falls for 151.6 days and collects up to 23.27" (591mm) of precipitation.Snowfall
In Napier Field, snow does not fall in April through December.Daylight
The average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 6:18 am and sunset at 7:04 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 6:27 pm CDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 during September translates into the following guidance:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during 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 Napier Field have in September?
What time are sunrise and sunset in September in Napier Field?
How many hours of sunshine does Napier Field have in September?
What is the UV index reading in September?
Average temperature in September
Napier Field, AL
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 69.6°F
The months with the highest average low temperature are July and August (73.6°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Napier Field, AL
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Napier Field, AL
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Napier Field, AL
- Average humidity in September: 73%
The months with the highest relative humidity are August and December (75%).
The months with the lowest relative humidity are May and October (69%).
Average rainfall in September
Napier Field, AL
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is November (1.22").
Average rainfall days in September
Napier Field, AL
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is August (20.7 days).
The month with the least rainy days is November (7.2 days).
Average snowfall in September
Napier Field, AL
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.16").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Napier Field, 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 April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Napier Field, 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: 8h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Napier Field, AL
- Average sunshine days in September: 13.4 days
The months with the most sunshine days are October and November (21.1 days).
The month with the least sunshine days is August (7.2 days).
Average UV index in September
Napier Field, 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
Napier Field, AL
- Average cloud cover in September: 29
The months with the most cloud cover are February and December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Napier Field, 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).
Napier Field, Alabama, USA
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