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
During the shift to September, Karnack records a mild decrease in average high-temperature, moving from 94.6°F (34.8°C) in August to a still hot 88.7°F (31.5°C). Karnack's average nighttime temperatures present a clear contrast to its daytime highs, measured at an enjoyable 67.1°F (19.5°C) in September.Heat index
The heat index in September is computed to be a fiery hot 102.2°F (39°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
In Karnack, the average relative humidity in September is 69%.Rainfall
September is the month with the least rainfall in Karnack. Rain falls for 11.2 days and accumulates 1.38" (35mm) of precipitation.Snowfall
In Karnack, snow does not fall in April through November.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:40 pm. On the last day of September, in Karnack, sunrise is at 7:10 am and sunset at 7:02 pm CDT.
Sunshine
In September, the average sunshine in Karnack is 9.5h.UV index
The average daily maximum UV index in September in Karnack is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 6 in September leads to these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Karnack in September?
What is the average humidity in September in Karnack?
What is the driest month in Karnack?
How many days does it rain in September in Karnack?
When it does not snow in Karnack?
What is the average length of the day in September in Karnack?
When is the sunrise / sunset in September in Karnack?
How long on average sun shines in September in Karnack?
What is the UV index reading in September in Karnack?
Average temperature in September
Karnack, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (95°F).
The month with the lowest average high temperature is January (54°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).
Average pressure in September
Karnack, TX
- Average pressure in September: 29.98"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
Karnack, TX
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Karnack, TX
- Average humidity in September: 69%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Karnack, TX
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in September
Karnack, TX
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is October (8.6 days).
Average snowfall in September
Karnack, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Karnack, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.1 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
Karnack, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Karnack, TX
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is October (20.9 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in September
Karnack, 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, February and December (UV index 3).
Average cloud cover in September
Karnack, TX
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Karnack, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Karnack, Texas, USA
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