September weather forecastStephenville, TX
September
Weather in September
September, the first month of the autumn in Stephenville, is still a tropical month, with an average temperature varying between 68.9°F (20.5°C) and 86.9°F (30.5°C).Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a very hot 95.4°F (35.2°C) in August to a hot 86.9°F (30.5°C). In September, Stephenville encounters an average low-temperature of 68.9°F (20.5°C) during the night.Heat index
For September, the heat index is computed to be a sweltering 95°F (35°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. 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 particularly relevant to children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
In September, the average relative humidity is 63%.Rainfall
In September, in Stephenville, the rain falls for 13 days. Throughout September, 1.97" (50mm) of precipitation is accumulated. Throughout the year, there are 121.3 rainfall days, and 23.07" (586mm) of precipitation is accumulated.Snowfall
In Stephenville, Texas, snow does not fall in April through October.Daylight
In September, the average length of the day in Stephenville, Texas, is 12h and 21min.On the first day of September, sunrise is at 7:08 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:18 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In Stephenville, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Stephenville, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (95.4°F).
The month with the lowest average high temperature is January (56.5°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (39°F).
Average pressure in September
Stephenville, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Stephenville, TX
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is September (7.6mph).
Average humidity in September
Stephenville, TX
- Average humidity in September: 63%
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Stephenville, TX
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is October (3.07").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days in September
Stephenville, TX
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in September
Stephenville, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Stephenville, TX
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Stephenville, TX
- Average daylight in September: 12h and 24min
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: 8h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Stephenville, TX
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is January (24 days).
The month with the least sunshine days is September (14.6 days).
Average UV index in September
Stephenville, 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
Stephenville, TX
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Stephenville, 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).
