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
The arrival of September suggests a slight decrease in the average high-temperature, moving from a sweltering 96.3°F (35.7°C) in August to a hot 88°F (31.1°C). September generally records an average low-temperature of 70.7°F (21.5°C).Heat index
In September, the average heat index is computed to be a torrid 96.8°F (36°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important 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.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.
Humidity
In Grand Prairie, the average relative humidity in September is 62%.Rainfall
In Grand Prairie, in September, during 10.8 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. Throughout the year, there are 91.2 rainfall days, and 8.11" (206mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 7:03 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:13 pm CDT.
Sunshine
In Grand Prairie, Texas, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 suggests this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in 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 Grand Prairie have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Grand Prairie have in September?
What is the UV index reading in September?
Average temperature in September
Grand Prairie, TX
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is August (96.3°F).
The month with the lowest average high temperature is January (54.9°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).
Average pressure in September
Grand Prairie, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Grand Prairie, TX
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is September (6.7mph).
Average humidity in September
Grand Prairie, TX
- Average humidity in September: 62%
The month with the highest relative humidity is May (71%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Grand Prairie, TX
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days in September
Grand Prairie, TX
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is September (10.8 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Grand Prairie, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.16").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Grand Prairie, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 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
Grand Prairie, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Grand Prairie, TX
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is January (25.6 days).
The month with the least sunshine days is September (16.5 days).
Average UV index in September
Grand Prairie, TX
- 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
Grand Prairie, TX
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Grand Prairie, 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).
Grand Prairie, Texas, USA
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