September weather forecastIrving, TX
September
Weather in September
September offers a respite from the height of summer's intense heat with highs of 88°F (31.1°C). The decrease in temperature is accompanied by an uptick in cloud coverage, reducing glare from the sun. Conditions take a turn, with September showing an increase in rainfall, amounting to 2.52" (64mm) on average. Even with the onset of fall, the hours of daylight remain quite long. Overall, the transition to cooler weather provides a refreshing change.Temperature
The beginning of September brings a minor change in the average high-temperature, shifting from a torrid 96.3°F (35.7°C) in August to a tropical 88°F (31.1°C). During the month of September, Irving's nighttime temperature lowers to an average of 70.7°F (21.5°C).Heat index
For most parts of September, the heat index is computed to be a very hot 96.8°F (36°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. 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 extremely significant for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
In September, the average relative humidity is 62%.Rainfall
In September, the rain falls for 14.3 days. Throughout September, 2.52" (64mm) of precipitation is accumulated. In Irving, during the entire year, the rain falls for 136.8 days and collects up to 29.09" (739mm) of precipitation.Snowfall
In Irving, snow does not fall in March through October.Daylight
In Irving, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:02 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:13 pm CDT.
Sunshine
In Irving, Texas, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Irving, 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 (54.7°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).
Average pressure in September
Irving, 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
Irving, TX
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in September
Irving, 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
Irving, TX
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in September
Irving, TX
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Irving, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in September
Irving, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Irving, TX
- Average daylight in September: 12h and 24min
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 30min
The months with the most sunshine are July and August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Irving, TX
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is January (23.8 days).
The months with the least sunshine days are May and September (13.9 days).
Average UV index in September
Irving, 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 and December (UV index 3).
Average cloud cover in September
Irving, TX
- Average cloud cover in September: 28
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
Irving, 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).
