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 is marked by a minor decrease in temperature, transitioning from a fiery hot 95.7°F (35.4°C) in August to a hot 87.4°F (30.8°C). Nighttime temperatures in September average to a pleasant 68.9°F (20.5°C).Heat index
In September, the heat index is evaluated at a hot 93.2°F (34°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Note that heat index values are valued for light wind and location in the shade. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humidity
The average relative humidity in September is 60%.Rainfall
In May, Texas, in September, during 13.5 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In May, during the entire year, the rain falls for 115.7 days and collects up to 19.96" (507mm) of precipitation.Snowfall
In May, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 21min.On the first day of September in May, sunrise is at 7:11 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:21 pm CDT.
Sunshine
In May, Texas, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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 it does not snow?
How many hours of daylight does May have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does May have in September?
What is the UV index intensity in September?
Average temperature in September
May, TX
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is August (95.7°F).
The months with the lowest average high temperature are January and December (58.1°F).
- Average low temperature in September: 68.9°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 (39°F).
Average pressure in September
May, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
May, TX
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is September (8.3mph).
Average humidity in September
May, TX
- Average humidity in September: 60%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
May, TX
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
May, TX
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in September
May, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
May, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
May, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
May, TX
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is May (13.4 days).
Average UV index in September
May, 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 3).
Average cloud cover in September
May, TX
- Average cloud cover in September: 28
The months with the most cloud cover are March and May (Cloud cover 34).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
May, 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).
May, Texas, USA
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