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
Dean's transition into September involves a shift in temperature, receding from a sweltering 97.3°F (36.3°C) in August to a tropical 87.6°F (30.9°C). Nighttime temperatures in September average to a pleasant 68.5°F (20.3°C).Heat index
The heat index value for September is calculated to be a fiery hot 95°F (35°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. 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 quite important for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.
Humidity
The average relative humidity in September is 60%.Rainfall
In Dean, during September, the rain falls for 11.7 days and regularly aggregates up to 2.32" (59mm) of precipitation. In Dean, during the entire year, the rain falls for 104.1 days and collects up to 21.22" (539mm) of precipitation.Snowfall
May through October are months without snowfall in Dean.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:07 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:18 pm CDT.
Sunshine
In September, the average sunshine in Dean is 8.4h.UV index
The average daily maximum UV index in September in Dean is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
How hot does it get in Dean in September?
What is the average humidity in September in Dean?
How many days does it rain in September in Dean?
When it does not snow in Dean?
What is the average length of the day in September in Dean?
What time are sunrise and sunset in September in Dean?
How long on average sun shines in September in Dean?
What is the UV index intensity in September in Dean?
Average temperature in September
Dean, TX
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (97.3°F).
The month with the lowest average high temperature is December (53.2°F).
- Average low temperature in September: 68.5°F
The month with the highest average low temperature is July (75.9°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Dean, 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 (29.87"Hg).
Average wind speed in September
Dean, TX
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is September (8.1mph).
Average humidity in September
Dean, TX
- Average humidity in September: 60%
The month with the highest relative humidity is May (67%).
The month with the lowest relative humidity is August (50%).
Average rainfall in September
Dean, TX
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in September
Dean, TX
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is May (13.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in September
Dean, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Dean, TX
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Dean, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in September
Dean, TX
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is May (15.8 days).
Average UV index in September
Dean, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Dean, TX
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Dean, 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).
Dean, Texas, USA
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