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
September signals a slight drop in average high-temperature, sliding from August's hot 94.8°F (34.9°C) to a still tropical 88.7°F (31.5°C). Clayton, in September, observes a steady average low-temperature of 67.5°F (19.7°C).Heat index
The heat index for September is calculated to be a fiery hot 102.2°F (39°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.Consider that heat index readings are for situations in the shade and light wind. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
The average relative humidity in September is 71%.Rainfall
In September, in Clayton, Texas, the rain falls for 14.4 days. Throughout September, 2.17" (55mm) of precipitation is accumulated. In Clayton, during the entire year, the rain falls for 147.8 days and collects up to 30.55" (776mm) of precipitation.Snowfall
In Clayton, Texas, snow does not fall in March through November.Daylight
The average length of the day in September in Clayton is 12h and 21min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:11 am and sunset at 7:03 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In Clayton, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Clayton during September?
What is the average humidity in September in Clayton?
How many days does it rain in September in Clayton?
When it does not snow in Clayton?
What is the average length of the day in September in Clayton?
When are sunrise and sunset in September in Clayton?
How many hours of sunshine does Clayton have in September?
What is the UV index reading in September in Clayton?
Average temperature in September
Clayton, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (94.8°F).
The month with the lowest average high temperature is January (55°F).
- Average low temperature in September: 67.5°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).
Average pressure in September
Clayton, 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 (29.93"Hg).
Average wind speed in September
Clayton, TX
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest months (with the lowest average wind speed) are July, August and September (5mph).
Average humidity in September
Clayton, TX
- Average humidity in September: 71%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Clayton, TX
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is April (3.19").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in September
Clayton, TX
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is August (15.1 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Clayton, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.39").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Clayton, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Clayton, 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: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Clayton, TX
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is October (20.4 days).
The months with the least sunshine days are June and September (13.3 days).
Average UV index in September
Clayton, 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
Clayton, TX
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Clayton, TX
- Average visibility in September: 6mi
The months with the highest visibility are March, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, April, May and December (5mi).
Clayton, Texas, USA
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