September weather forecastKarnes City, TX
September
Weather in September
The first month of the autumn, September, is also a hot month in Karnes City, Texas, with temperature in the range of an average high of 89.8°F (32.1°C) and an average low of 73°F (22.8°C).Temperature
With the arrival of September, Karnes City experiences a modest decline in average high-temperatures, transitioning from a sweltering 96.8°F (36°C) in August to a hot 89.8°F (32.1°C). The average nighttime temperature lowers to a pleasant 73°F (22.8°C) throughout September.Heat index
The heat index value for September is estimated at a scorching 105.8°F (41°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In Karnes City, the average relative humidity in September is 71%.Rainfall
The month with the most rainfall is September, when the rain falls for 17.1 days and typically aggregates up to 2.87" (73mm) of precipitation.Snowfall
In Karnes City, snow does not fall in February through December.Daylight
The average length of the day in September is 12h and 19min.On the first day of September in Karnes City, sunrise is at 7:09 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:18 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: During September, 6 as the daily maximum UV index converts into the following advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. 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. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Karnes City, TX
- Average high temperature in September: 89.8°F
The warmest month (with the highest average high temperature) is August (96.8°F).
The month with the lowest average high temperature is January (62.8°F).
- Average low temperature in September: 73°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (46°F).
Average pressure in September
Karnes City, TX
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Karnes City, TX
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is May (9.8mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in September
Karnes City, TX
- Average humidity in September: 71%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is August (64%).
Average rainfall in September
Karnes City, TX
- Average rainfall in September: 2.87"
The wettest month (with the highest rainfall) is September (2.87").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in September
Karnes City, TX
- Average rainfall days in September: 17.1 days
The month with the highest number of rainy days is September (17.1 days).
The month with the least rainy days is August (9.7 days).
Average snowfall in September
Karnes City, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Karnes City, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Karnes City, TX
- Average daylight in September: 12h and 18min
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 30min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Karnes City, TX
- Average sunshine days in September: 10.4 days
The month with the most sunshine days is August (19.3 days).
The month with the least sunshine days is September (10.4 days).
Average UV index in September
Karnes City, 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
Karnes City, TX
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Karnes City, 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).
