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
With the start of September, Jacksonville measures an average high-temperature of a warm 84.7°F (29.3°C), not significantly differing from August's 89.2°F (31.8°C). An average low-temperature of 68.4°F (20.2°C) is common during the nights of September.Heat index
September's average heat index is evaluated at a very hot 95°F (35°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Heat index specifics point out values are for conditions of shade and a slight breeze. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
In Jacksonville, the average relative humidity in September is 76%.Rainfall
In Jacksonville, in September, during 13.3 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, there are 134.5 rainfall days, and 14.61" (371mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall in Jacksonville.Daylight
The average length of the day in September in Jacksonville, Georgia, is 12h and 21min.On the first day of the month, sunrise is at 7:07 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:25 am and sunset at 7:17 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Jacksonville is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
How hot does it get in Jacksonville in September?
What is the average humidity in September in Jacksonville?
How much does it rain in Jacksonville in September?
When it does not snow in Jacksonville?
What is the average length of the day in September in Jacksonville?
What time are sunrise and sunset in September in Jacksonville?
How many hours of sunshine does Jacksonville have in September?
How high is the UV index in September in Jacksonville?
Average temperature in September
Jacksonville, GA
- Average high temperature in September: 84.7°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (57.4°F).
- Average low temperature in September: 68.4°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 (40.6°F).
Average pressure in September
Jacksonville, GA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Jacksonville, GA
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are February and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Jacksonville, GA
- Average humidity in September: 76%
The months with the highest relative humidity are August and December (77%).
The months with the lowest relative humidity are January, October and November (72%).
Average rainfall in September
Jacksonville, GA
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is November (0.71").
Average rainfall days in September
Jacksonville, GA
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is November (5.5 days).
Average snowfall in September
Jacksonville, GA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Jacksonville, GA
- 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 March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Jacksonville, GA
- 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 July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Jacksonville, GA
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is November (22.4 days).
The month with the least sunshine days is July (8.9 days).
Average UV index in September
Jacksonville, GA
- Average UV index in September: 6
The months with the highest UV index are May, June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Jacksonville, GA
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Jacksonville, GA
- 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, Georgia, USA
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