September weather forecastFreeport, TX
September
Weather in September
September, the first month of the autumn in Freeport, is also a moderately hot month, with an average temperature ranging between min 77.2°F (25.1°C) and max 85.5°F (29.7°C).Temperature
September's presence marks an average high-temperature of a moderately hot 85.5°F (29.7°C), subtly varied from August's 88.9°F (31.6°C). September notes an average low temperature of 77.2°F (25.1°C), subtly down from the daytime highs.Heat index
The heat index value for September is calculated to be a very hot 95°F (35°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. 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 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital 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.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. 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. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In Freeport, the average relative humidity in September is 75%.Rainfall
September is the month with the most rainfall in Freeport. Rain falls for 18.7 days and accumulates 3.58" (91mm) of precipitation.Snowfall
February through December are months without snowfall in Freeport.Ocean temperature
In Freeport, Texas, the average seawater temperature in September is 84°F (28.9°C).Note: Water temperature ranging between 77°F (25°C) and 84.2°F (29°C) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.
Daylight
In September, the average length of the day is 12h and 19min.On the first day of September in Freeport, sunrise is at 6:59 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:07 pm CDT.
Sunshine
The average sunshine in September in Freeport is 8.5h.UV index
The average daily maximum UV index in September in Freeport is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. 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. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Beware! Reflections from sand and water can intensify the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Freeport, TX
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is August (88.9°F).
The month with the lowest average high temperature is January (61°F).
- Average low temperature in September: 77.2°F
The month with the highest average low temperature is August (81°F).
The coldest month (with the lowest average low temperature) is January (51.4°F).
Average pressure in September
Freeport, TX
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Freeport, TX
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Freeport, TX
- Average humidity in September: 75%
The months with the highest relative humidity are February and March (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Freeport, TX
- Average rainfall in September: 3.58"
The wettest month (with the highest rainfall) is September (3.58").
The driest month (with the least rainfall) is March (0.67").
Average rainfall days in September
Freeport, TX
- Average rainfall days in September: 18.7 days
The month with the highest number of rainy days is September (18.7 days).
The months with the least rainy days are January and February (9.4 days).
Average snowfall days in September
Freeport, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Freeport, TX
- Average sea temperature in September: 84°F
The best month for swimming (with the highest average sea temperature) is August (86.8°F).
The coldest month (with the lowest average sea temperature) is January (60.4°F).
Average daylight in September /
Average sunshine in September
Freeport, TX
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Freeport, TX
- Average sunshine days in September: 8.4 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is September (8.4 days).
Average UV index in September
Freeport, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Freeport, TX
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in September
Freeport, TX
- 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).
