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
September's arrival aligns with a minor decrease in average high-temperatures, from August's tropical 93.9°F (34.4°C) to a still hot 86.4°F (30.2°C). An average nighttime temperature of 68.4°F (20.2°C) is observed during September.Heat index
During September, the heat index is calculated to be a fiery hot 96.8°F (36°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.Heat index details are generally centered around shaded locations and a mild breeze. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In September, the average relative humidity in Johnson City, Texas, is 70%.Rainfall
In Johnson City, in September, during 16.4 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. Throughout the year, in Johnson City, there are 149 rainfall days, and 24.92" (633mm) of precipitation is accumulated.Snowfall
March through October and December are months without snowfall in Johnson City.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 7:10 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:26 am and sunset at 7:19 pm CDT.
Sunshine
In Johnson City, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September in Johnson City is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
How hot is September in Johnson City?
What is the average humidity in September in Johnson City?
How many days does it rain in September in Johnson City?
When it does not snow in Johnson City?
How many hours of daylight does Johnson City have in September?
When are sunrise and sunset in September in Johnson City?
How many hours of sunshine does Johnson City have in September?
What is the UV index intensity in September in Johnson City?
Average temperature in September
Johnson City, TX
- Average high temperature in September: 86.4°F
The warmest month (with the highest average high temperature) is August (93.9°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in September: 68.4°F
The month with the highest average low temperature is August (72.9°F).
The coldest month (with the lowest average low temperature) is January (41.4°F).
Average pressure in September
Johnson City, 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 (29.9"Hg).
Average wind speed in September
Johnson City, TX
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in September
Johnson City, TX
- Average humidity in September: 70%
The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Johnson City, TX
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is February (1.18").
Average rainfall days in September
Johnson City, TX
- Average rainfall days in September: 16.4 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in September
Johnson City, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.2").
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Johnson City, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Johnson City, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are November and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Johnson City, TX
- Average sunshine days in September: 11.1 days
The month with the most sunshine days is January (21.1 days).
The months with the least sunshine days are May and September (11.1 days).
Average UV index in September
Johnson 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
Johnson City, TX
- Average cloud cover in September: 35
The month with the most cloud cover is May (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Johnson 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).
Johnson City, Texas, USA
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