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
A mild drop in Jacksonville's average high-temperature is observed in September, transitioning from a torrid 95.4°F (35.2°C) in August to a hot 88.9°F (31.6°C). An average low-temperature of 67.8°F (19.9°C) is common during the nights of September.Heat index
The heat index in September is computed to be a sweltering 102.2°F (39°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
In September, the average relative humidity is 70%.Rainfall
In Jacksonville, Texas, in September, it is raining for 14.1 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, in Jacksonville, Texas, there are 149.1 rainfall days, and 32.32" (821mm) of precipitation is accumulated.Snowfall
In Jacksonville, snow does not fall in March through December.Daylight
In September, the average length of the day is 12h and 21min.On the first day of the month, sunrise is at 6:56 am and sunset at 7:44 pm. On the last day of September, in Jacksonville, sunrise is at 7:14 am and sunset at 7:06 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In Jacksonville, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily UV index of 6 turns into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
How hot is it in Jacksonville in September?
What is the average humidity in September in Jacksonville?
How many days does it rain in September in Jacksonville?
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 long on average sun shines in September in Jacksonville?
What is the UV index reading in September in Jacksonville?
Average temperature in September
Jacksonville, TX
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is August (95.4°F).
The month with the lowest average high temperature is January (55.4°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is August (73.2°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).
Average pressure in September
Jacksonville, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Jacksonville, TX
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is September (5.3mph).
Average humidity in September
Jacksonville, TX
- Average humidity in September: 70%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Jacksonville, TX
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is October (3.74").
The driest months (with the least rainfall) are July and August (1.89").
Average rainfall days in September
Jacksonville, TX
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Jacksonville, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.51").
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, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 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
Jacksonville, TX
- 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 5min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Jacksonville, TX
- Average sunshine days in September: 14 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is February (13.6 days).
Average UV index in September
Jacksonville, TX
- 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
Jacksonville, TX
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Jacksonville, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, March, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February, April and May (5mi).
Jacksonville, Texas, USA
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