September weather forecastMerkel, TX
September
Weather in September
The first month of the autumn, September, is also a hot month in Merkel, Texas, with temperature in the range of an average high of 86.9°F (30.5°C) and an average low of 68.9°F (20.5°C).Temperature
The beginning of September marks a decrease in the average high-temperature, transitioning from a torrid 96.3°F (35.7°C) in August to a tropical 86.9°F (30.5°C). Merkel experiences a steady low-temperature of 68.9°F (20.5°C) throughout September.Heat index
In September, the average heat index is estimated at a tropical 91.4°F (33°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Heat index data is primarily for areas with shade and subjected to light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', comes about by integrating the temperature readings with the humidity levels. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The most humid month is September, with an average relative humidity of 57%.Rainfall
September is the month with the most rainfall. Rain falls for 10.9 days and accumulates 2.2" (56mm) of precipitation.Snowfall
In Merkel, snow does not fall in April through September.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 7:15 am and sunset at 8:04 pm. On the last day of September, in Merkel, sunrise is at 7:33 am and sunset at 7:25 pm CDT.
Sunshine
In Merkel, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Merkel is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Merkel, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (96.3°F).
The month with the lowest average high temperature is December (56.5°F).
- Average low temperature in September: 68.9°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 (37.8°F).
Average pressure in September
Merkel, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Merkel, TX
- Average wind speed in September: 10.2mph
The windiest month (with the highest average wind speed) is April (14.4mph).
The calmest month (with the lowest average wind speed) is September (10.2mph).
Average humidity in September
Merkel, TX
- Average humidity in September: 57%
The month with the highest relative humidity is September (57%).
The month with the lowest relative humidity is August (46%).
Average rainfall in September
Merkel, TX
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is September (2.2").
The driest months (with the least rainfall) are January and February (0.67").
Average rainfall days in September
Merkel, TX
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is May (11.7 days).
The month with the least rainy days is January (3.4 days).
Average snowfall in September
Merkel, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Merkel, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Merkel, TX
- Average daylight in September: 12h and 24min
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 6min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Merkel, TX
- Average sunshine days in September: 17 days
The month with the most sunshine days is January (25.6 days).
The month with the least sunshine days is May (16.3 days).
Average UV index in September
Merkel, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Merkel, TX
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 27).
The months with the least cloud cover are June and August (Cloud cover 18).
Average visibility in September
Merkel, 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).
