September weather forecastHarrells, TX
September
Weather in September
September, the first month of the autumn in Harrells, is still a tropical month, with an average temperature fluctuating between 88.9°F (31.6°C) and 69.1°F (20.6°C).Temperature
In Harrells, the average high-temperature in September gently drops from a hot 94.5°F (34.7°C) in August to a still tropical 88.9°F (31.6°C). Harrells, during September nights, observes an average temperature of 69.1°F (20.6°C).Heat index
The heat index for September is estimated at a blisteringly hot 105.8°F (41°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. 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
The average relative humidity in September is 76%.Rainfall
In Harrells, during September, the rain falls for 16.8 days and regularly aggregates up to 3.07" (78mm) of precipitation. Throughout the year, there are 175 rainfall days, and 35.28" (896mm) of precipitation is accumulated.Snowfall
March through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:37 pm. On the last day of September, in Harrells, sunrise is at 7:08 am and sunset at 7:01 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, an average UV index of 6 transforms into the following instructions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harrells, TX
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 69.1°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Harrells, 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
Harrells, TX
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).
Average humidity in September
Harrells, TX
- Average humidity in September: 76%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Harrells, TX
- Average rainfall in September: 3.07"
The wettest month (with the highest rainfall) is August (4.33").
The driest months (with the least rainfall) are February and November (2.13").
Average rainfall days in September
Harrells, TX
- Average rainfall days in September: 16.8 days
The month with the highest number of rainy days is August (19.8 days).
The month with the least rainy days is November (10.9 days).
Average snowfall in September
Harrells, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.55").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Harrells, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Harrells, TX
- Average daylight in September: 12h and 18min
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 54min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Harrells, TX
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is August (9.4 days).
Average UV index in September
Harrells, TX
- Average UV index in September: 6
The months with the highest UV index are May, 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
Harrells, TX
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is October (Cloud cover 33).
Average visibility in September
Harrells, 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).
