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
Merit, Texas, in September undergoes a slight reduction in the average high-temperature, shifting from August's 94.6°F (34.8°C) to a still tropical 87.1°F (30.6°C). In Merit, an average nighttime temperature of 68.7°F (20.4°C) is expected during September.Heat index
The heat index value for September is computed to be a torrid 95°F (35°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
The average relative humidity in September in Merit is 66%.Rainfall
In Merit, in September, during 15.4 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. Throughout the year, there are 146.8 rainfall days, and 33.78" (858mm) of precipitation is accumulated.Snowfall
March through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 6:59 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:10 pm CDT.
Sunshine
In September, the average sunshine in Merit is 8.5h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 6 suggests these recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Merit, TX
- Average high temperature in September: 87.1°F
The warmest month (with the highest average high temperature) is August (94.6°F).
The month with the lowest average high temperature is January (53.6°F).
- Average low temperature in September: 68.7°F
The months with the highest average low temperature are July and August (74.8°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).
Average pressure in September
Merit, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Merit, TX
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest months (with the lowest average wind speed) are August and September (6.8mph).
Average humidity in September
Merit, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Merit, TX
- Average rainfall in September: 3.03"
The wettest month (with the highest rainfall) is October (4.17").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in September
Merit, TX
- Average rainfall days in September: 15.4 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Merit, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in September
Merit, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Merit, 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: 8h and 3min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Merit, TX
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is January (21.9 days).
The months with the least sunshine days are May and September (13.3 days).
Average UV index in September
Merit, 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, November and December (UV index 3).
Average cloud cover in September
Merit, TX
- Average cloud cover in September: 29
The months with the most cloud cover are February and March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Merit, 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).
Merit, Texas, USA
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