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
Cost's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's torrid 97°F (36.1°C) to a tropical 89.4°F (31.9°C). Cost records an average nighttime low-temperature of 71.6°F (22°C) throughout September.Heat index
In September, the average heat index is estimated at a blisteringly hot 104°F (40°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.Realize that the values for the heat index are set for shaded places and light winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in 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 71%.Rainfall
In Cost, in September, during 16.4 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, in Cost, there are 146.3 rainfall days, and 21.34" (542mm) of precipitation is accumulated.Snowfall
March through November are months without snowfall.Daylight
The average length of the day in September in Cost is 12h and 20min.On the first day of September in Cost, sunrise is at 7:07 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:16 pm CDT.
Sunshine
In September, the average sunshine in Cost is 8.3h.UV index
In September, the average daily maximum UV index in Cost 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 average person.Note: The UV index of 6 in September translates into these instructions:
Inhibit overexposure. Warding off sun damage is of utmost importance. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Cost during September?
What is the average humidity in September in Cost?
How many days does it rain in September in Cost?
When it does not snow in Cost?
What is the average length of the day in September in Cost?
When are sunrise and sunset in September in Cost?
How many hours of sunshine does Cost have in September?
How high is the UV index in September in Cost?
Average temperature in September
Cost, TX
- Average high temperature in September: 89.4°F
The warmest month (with the highest average high temperature) is August (97°F).
The month with the lowest average high temperature is January (60.8°F).
- Average low temperature in September: 71.6°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in September
Cost, TX
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Cost, TX
- Average wind speed in September: 6mph
The windiest months (with the highest average wind speed) are February, March, April and May (8.3mph).
The calmest month (with the lowest average wind speed) is September (6mph).
Average humidity in September
Cost, TX
- Average humidity in September: 71%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is August (64%).
Average rainfall in September
Cost, TX
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in September
Cost, TX
- Average rainfall days in September: 16.4 days
The month with the highest number of rainy days is September (16.4 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in September
Cost, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Cost, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January, February and December (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Cost, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Cost, TX
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in September
Cost, 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
Cost, TX
- Average cloud cover in September: 35
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Cost, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, August, September, October, November and December (6mi).
The months with the lowest visibility are March, April, May, June and July (5mi).
Cost, Texas, USA
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