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
Hallettsville's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's torrid 95.9°F (35.5°C) to a hot 88.9°F (31.6°C). Throughout September, Hallettsville records an average temperature of 71.8°F (22.1°C) at night.Heat index
Throughout September, the heat index is calculated to be a blisteringly hot 105.8°F (41°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', comes about by integrating the temperature readings with the humidity levels. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In Hallettsville, the average relative humidity in September is 74%.Rainfall
In Hallettsville, during September, the rain falls for 17.8 days and regularly aggregates up to 3.31" (84mm) of precipitation. Throughout the year, in Hallettsville, there are 166.8 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
In Hallettsville, snow does not fall in February through November.Daylight
The average length of the day in September in Hallettsville is 12h and 20min.On the first day of the month, sunrise is at 7:05 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:14 pm CDT.
Sunshine
In Hallettsville, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September in Hallettsville is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 6 during September leads to these advisories:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot is September in Hallettsville?
What is the average humidity in September in Hallettsville?
How many days does it rain in September in Hallettsville?
When it does not snow in Hallettsville?
What is the average length of the day in September in Hallettsville?
When is the sunrise / sunset in September in Hallettsville?
How long on average sun shines in September in Hallettsville?
How high is the UV index in September in Hallettsville?
Average temperature in September
Hallettsville, TX
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (61°F).
- Average low temperature in September: 71.8°F
The month with the highest average low temperature is August (75.6°F).
The coldest month (with the lowest average low temperature) is January (44.6°F).
Average pressure in September
Hallettsville, TX
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Hallettsville, TX
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is September (6mph).
Average humidity in September
Hallettsville, TX
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (78%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Hallettsville, TX
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is May (3.86").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in September
Hallettsville, TX
- Average rainfall days in September: 17.8 days
The month with the highest number of rainy days is September (17.8 days).
The month with the least rainy days is January (11.2 days).
Average snowfall in September
Hallettsville, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.2").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Hallettsville, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Hallettsville, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Hallettsville, TX
- Average sunshine days in September: 10 days
The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Hallettsville, 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
Hallettsville, TX
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Hallettsville, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, August, September, October, November and December (6mi).
The months with the lowest visibility are March, April, May, June and July (5mi).
Hallettsville, Texas, USA
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