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
Dilley's progression into September involves a minor drop in the average high-temperature, slightly receding from a very hot 99°F (37.2°C) in August to a tropical 91.4°F (33°C). Throughout September, the average low-temperature dips to a moderately hot 73.8°F (23.2°C).Heat index
During September, the heat index is appraised at a blisteringly hot 105.8°F (41°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.The standards for the heat index are set for locations in shade and under light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
The average relative humidity in September in Dilley is 63%.Rainfall
In Dilley, in September, during 14.7 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. Throughout the year, there are 108.4 rainfall days, and 12.48" (317mm) of precipitation is accumulated.Snowfall
In Dilley, snow does not fall in February through October and December.Daylight
In Dilley, the average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 7:15 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:23 pm CDT.
Sunshine
The average sunshine in September in Dilley is 8.5h.UV index
In Dilley, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September in Dilley?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Dilley have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Dilley, TX
- Average high temperature in September: 91.4°F
The warmest month (with the highest average high temperature) is August (99°F).
The month with the lowest average high temperature is January (64.2°F).
- Average low temperature in September: 73.8°F
The month with the highest average low temperature is August (78.1°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in September
Dilley, TX
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are May and June (29.88"Hg).
Average wind speed in September
Dilley, TX
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is May (10.5mph).
The calmest month (with the lowest average wind speed) is December (7.3mph).
Average humidity in September
Dilley, TX
- Average humidity in September: 63%
The month with the highest relative humidity is December (67%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Dilley, TX
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Dilley, TX
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is September (14.7 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in September
Dilley, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and November (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Dilley, TX
- 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 and October (0 days).
Average daylight in September /
Average sunshine in September
Dilley, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Dilley, TX
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is September (14.2 days).
Average UV index in September
Dilley, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Dilley, TX
- Average cloud cover in September: 30
The months with the most cloud cover are March and May (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Dilley, 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).
Dilley, Texas, USA
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