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
In Briarcliff, the average high-temperature in September slightly decreases from a torrid 95.5°F (35.3°C) in August to a tropical 87.8°F (31°C). During September nights, Briarcliff records an average temperature of 69.8°F (21°C).Heat index
September's mean heat index is evaluated at a fiery hot 98.6°F (37°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.
Humidity
The average relative humidity in September is 67%.Rainfall
In Briarcliff, in September, during 14.3 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. Throughout the year, in Briarcliff, there are 137.4 rainfall days, and 24.13" (613mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
The average length of the day in September is 12h and 20min.On the first day of September in Briarcliff, Texas, sunrise is at 7:09 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:18 pm CDT.
Sunshine
In September, the average sunshine in Briarcliff is 8.3h.UV index
The average daily maximum UV index in September in Briarcliff is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. 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
How hot is September in Briarcliff?
What is the average humidity in September in Briarcliff?
How many days does it rain in September in Briarcliff?
When it does not snow in Briarcliff?
How many hours of daylight does Briarcliff have in September?
What time are sunrise and sunset in September in Briarcliff?
How many hours of sunshine does Briarcliff have in September?
What is the UV index reading in September in Briarcliff?
Average temperature in September
Briarcliff, TX
- Average high temperature in September: 87.8°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (58.8°F).
- Average low temperature in September: 69.8°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (41.9°F).
Average pressure in September
Briarcliff, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are May and June (29.91"Hg).
Average wind speed in September
Briarcliff, TX
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is March (9.6mph).
The calmest month (with the lowest average wind speed) is September (6.3mph).
Average humidity in September
Briarcliff, TX
- Average humidity in September: 67%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Briarcliff, TX
- Average rainfall in September: 3.03"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in September
Briarcliff, TX
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in September
Briarcliff, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Briarcliff, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.9 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
Briarcliff, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are November and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Briarcliff, TX
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is January (21.2 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in September
Briarcliff, 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 3).
Average cloud cover in September
Briarcliff, TX
- Average cloud cover in September: 33
The months with the most cloud cover are March and May (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Briarcliff, 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).
Briarcliff, Texas, USA
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