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
Jacksonville's entry into September measures an average high-temperature of a moderately hot 83.7°F (28.7°C), closely parallel to the preceding month. Throughout the September nights, Jacksonville encounters a low-temperature of 63.9°F (17.7°C).Heat index
Throughout September, the heat index is evaluated at a tropical 91.4°F (33°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', represents the fusion of temperature and moisture in the air to suggest how warm it feels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In September, the average relative humidity is 75%.Rainfall
In September, the rain falls for 13.7 days. Throughout September, 2.56" (65mm) of precipitation is accumulated. In Jacksonville, during the entire year, the rain falls for 178.5 days and collects up to 38.78" (985mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:08 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:28 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In Jacksonville, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Heed the precautions - It is counselled to guard against solar damage. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. 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 is 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 Jacksonville have in September?
When are sunrise and sunset in September in Jacksonville?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Jacksonville, AL
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (50°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Jacksonville, AL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Jacksonville, AL
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Jacksonville, AL
- Average humidity in September: 75%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Jacksonville, AL
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is October (2.24").
Average rainfall days in September
Jacksonville, AL
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is July (22.7 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Jacksonville, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.83").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Jacksonville, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Jacksonville, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Jacksonville, AL
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in September
Jacksonville, AL
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Jacksonville, AL
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are June and September (Cloud cover 30).
Average visibility in September
Jacksonville, 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).
Jacksonville, Alabama, USA
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