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
The onset of September brings a small shift in high-temperatures, falling from 94.6°F (34.8°C) in August to a still tropical 88.9°F (31.6°C). An average low-temperature of 68.7°F (20.4°C) is recorded in the month of September.Heat index
During September, the heat index is calculated to be a blisteringly hot 105.8°F (41°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
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 perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. 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 particularly important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
In Jasper, the average relative humidity in September is 75%.Rainfall
In September, the rain falls for 15.7 days. Throughout September, 3.07" (78mm) of precipitation is accumulated. Throughout the year, there are 169.9 rainfall days, and 35.83" (910mm) of precipitation is accumulated.Snowfall
January through March, September and December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 1 snowfall days, and 0.79" (20mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:52 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:01 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September in Jasper is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. 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. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Jasper have in September?
What is the UV index intensity in September?
Average temperature in September
Jasper, TX
- Average high temperature in September: 88.9°F
The warmest months (with the highest average high temperature) are July and August (94.6°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 68.7°F
The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (40.6°F).
Average pressure in September
Jasper, TX
- Average pressure in September: 29.96"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
Jasper, TX
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).
Average humidity in September
Jasper, TX
- Average humidity in September: 75%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Jasper, TX
- Average rainfall in September: 3.07"
The wettest month (with the highest rainfall) is August (4.25").
The driest month (with the least rainfall) is November (2.2").
Average rainfall days in September
Jasper, TX
- Average rainfall days in September: 15.7 days
The month with the highest number of rainy days is August (17.7 days).
The months with the least rainy days are January and October (11.1 days).
Average snowfall in September
Jasper, TX
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (0.55").
The months with the least snowfall are April, May, June, July, August, October and November (0").
Average snowfall days in September
Jasper, TX
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (0.5 days).
The months with the least snowfall days are April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Jasper, 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 5min
The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Jasper, TX
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in September
Jasper, TX
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Jasper, TX
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is October (Cloud cover 35).
Average visibility in September
Jasper, TX
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Jasper, Texas, USA
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