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 corresponds with a light shift in temperature, down from a hot 91.9°F (33.3°C) in August to a moderately hot 82.9°F (28.3°C). Throughout September, Sterley experiences a low-temperature average of 63.5°F (17.5°C).Heat index
Throughout September, the heat index is appraised at a tropical 86°F (30°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.The standards for the heat index are set for locations in shade and under light breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
With an average relative humidity of 58%, September is the most humid month.Rainfall
The month with the most rainfall is September, when the rain falls for 12.4 days and typically aggregates up to 2.32" (59mm) of precipitation.Snowfall
In Sterley, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:19 am and sunset at 8:11 pm. On the last day of September, in Sterley, sunrise is at 7:39 am and sunset at 7:30 pm CDT.
Sunshine
The average sunshine in September is 9h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 6 in September leads to these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the most humid month?
What is the average humidity in September?
What is the wettest month?
How much does it rain in Sterley in September?
When it does not snow in Sterley?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September in Sterley?
How many hours of sunshine does Sterley have in September?
How high is the UV index in September in Sterley?
Average temperature in September
Sterley, TX
- Average high temperature in September: 82.9°F
The warmest month (with the highest average high temperature) is July (92.3°F).
The month with the lowest average high temperature is December (51.6°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in September
Sterley, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Sterley, TX
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is April (13.8mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).
Average humidity in September
Sterley, TX
- Average humidity in September: 58%
The month with the highest relative humidity is September (58%).
The month with the lowest relative humidity is April (42%).
Average rainfall in September
Sterley, TX
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is September (2.32").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days in September
Sterley, TX
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in September
Sterley, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Sterley, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sterley, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Sterley, TX
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is January (26.5 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in September
Sterley, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Sterley, TX
- Average cloud cover in September: 24
The month with the most cloud cover is September (Cloud cover 24).
The months with the least cloud cover are June and August (Cloud cover 16).
Average visibility in September
Sterley, 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).
Sterley, Texas, USA
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