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
With the arrival of September, Shelbyville notices a mild change in the average high-temperature, sliding from August's fiery hot 95°F (35°C) to a hot 88.9°F (31.6°C). In the month of September, the average low-temperature in Shelbyville usually rests at a refreshing 67.6°F (19.8°C).Heat index
The average heat index in September is appraised at a scorching 104°F (40°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.
Humidity
In September, the average relative humidity is 72%.Rainfall
In Shelbyville, in September, during 15 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. Throughout the year, there are 160.4 rainfall days, and 35.83" (910mm) of precipitation is accumulated.Snowfall
Months with snowfall in Shelbyville are January through March, September and December. September is the first month it typically snows in Shelbyville. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Shelbyville, Texas, during the entire year, snow falls for 2.6 days and aggregates up to 0.79" (20mm) of snow.Daylight
The average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 6:52 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:02 pm CDT.
Sunshine
The average sunshine in September in Shelbyville is 9.1h.UV index
The average daily maximum UV index in September in Shelbyville is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Ward off overexposure. Defence against solar harm is crucial. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Boost your sun resistance with garments that are densely woven yet spacious. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Shelbyville during September?
What is the average humidity in September in Shelbyville?
How much does it rain in Shelbyville in September?
When does it start to snow in Shelbyville?
How many hours of daylight does Shelbyville have in September?
What time are sunrise and sunset in September in Shelbyville?
How many hours of sunshine does Shelbyville have in September?
What is the UV index reading in September in Shelbyville?
Average temperature in September
Shelbyville, TX
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (55.8°F).
- Average low temperature in September: 67.6°F
The month with the highest average low temperature is August (73.2°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).
Average pressure in September
Shelbyville, 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 (29.93"Hg).
Average wind speed in September
Shelbyville, TX
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.8mph).
Average humidity in September
Shelbyville, TX
- Average humidity in September: 72%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Shelbyville, TX
- Average rainfall in September: 2.83"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (2.44").
Average rainfall days in September
Shelbyville, TX
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is March (15.5 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in September
Shelbyville, TX
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (0.39").
The months with the least snowfall are April, May, June, July, August, October and November (0").
Average snowfall days in September
Shelbyville, TX
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (0.9 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Shelbyville, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Shelbyville, TX
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is February (12.3 days).
Average UV index in September
Shelbyville, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Shelbyville, TX
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Shelbyville, TX
- Average visibility in September: 5mi
The months with the highest visibility are June, August, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, September and December (5mi).
Shelbyville, Texas, USA
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