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 marks a gentle change in average high-temperature, declining from August's sweltering 95.4°F (35.2°C) to a hot 88.7°F (31.5°C). During the nights in September, an average low-temperature of 70.5°F (21.4°C) is observed in Chappell Hill.Heat index
Throughout September, the heat index is calculated to be a blisteringly hot 104°F (40°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.Metrics for the heat index primarily focus on shaded spots and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
The average relative humidity in September in Chappell Hill is 74%.Rainfall
In Chappell Hill, Texas, in September, it is raining for 16.1 days, with typically 1.85" (47mm) of accumulated precipitation. In Chappell Hill, Texas, during the entire year, the rain falls for 141.3 days and collects up to 17.4" (442mm) of precipitation.Snowfall
February through November are months without snowfall.Daylight
The average length of the day in September is 12h and 20min.On the first day of September in Chappell Hill, Texas, sunrise is at 7:02 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:11 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 suggests this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
How hot does it get in Chappell Hill in September?
What is the average humidity in September in Chappell Hill?
How many days does it rain in September in Chappell Hill?
When it does not snow in Chappell Hill?
What is the average length of the day in September in Chappell Hill?
When are sunrise and sunset in September in Chappell Hill?
How long on average sun shines in September in Chappell Hill?
What is the UV index intensity in September in Chappell Hill?
Average temperature in September
Chappell Hill, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (95.4°F).
The month with the lowest average high temperature is January (59.2°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in September
Chappell Hill, 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
Chappell Hill, TX
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are February and March (8.5mph).
The calmest month (with the lowest average wind speed) is September (5.8mph).
Average humidity in September
Chappell Hill, TX
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Chappell Hill, TX
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (3.03").
The driest months (with the least rainfall) are February and November (0.83").
Average rainfall days in September
Chappell Hill, TX
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is September (16.1 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Chappell Hill, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Chappell Hill, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Chappell Hill, 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Chappell Hill, TX
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is January (19.2 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Chappell Hill, 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
Chappell Hill, TX
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Chappell Hill, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, August, September, October, November and December (6mi).
The months with the lowest visibility are May, June and July (5mi).
Chappell Hill, Texas, USA
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