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
During the shift to September, Leon Valley records a mild decrease in average high-temperature, moving from a sweltering 96.4°F (35.8°C) in August to a hot 88.7°F (31.5°C). September nights in Leon Valley, Texas, experience a consistent temperature drop to a pleasant 71.4°F (21.9°C).Heat index
In September, the average heat index is evaluated at a sweltering 100.4°F (38°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through 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. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
In Leon Valley, the average relative humidity in September is 66%.Rainfall
In Leon Valley, Texas, in September, it is raining for 16.6 days, with typically 3.5" (89mm) of accumulated precipitation. Throughout the year, in Leon Valley, there are 136.6 rainfall days, and 22.72" (577mm) of precipitation is accumulated.Snowfall
In Leon Valley, snow does not fall in March through December.Daylight
The average length of the day in September in Leon Valley is 12h and 20min.On the first day of the month, sunrise is at 7:12 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:20 pm CDT.
Sunshine
The average sunshine in September in Leon Valley is 8.4h.UV index
In Leon Valley, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Leon Valley during September?
What is the average humidity in September in Leon Valley?
How much does it rain in Leon Valley in September?
When it does not snow in Leon Valley?
What is the average length of the day in September in Leon Valley?
When are sunrise and sunset in September in Leon Valley?
How many hours of sunshine does Leon Valley have in September?
What is the UV index reading in September in Leon Valley?
Average temperature in September
Leon Valley, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (96.4°F).
The month with the lowest average high temperature is January (61.3°F).
- Average low temperature in September: 71.4°F
The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in September
Leon Valley, TX
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Leon Valley, TX
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is May (8.9mph).
The calmest month (with the lowest average wind speed) is September (6.5mph).
Average humidity in September
Leon Valley, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Leon Valley, TX
- Average rainfall in September: 3.5"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Leon Valley, TX
- Average rainfall days in September: 16.6 days
The month with the highest number of rainy days is September (16.6 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Leon Valley, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Leon Valley, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.3 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
Leon Valley, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Leon Valley, TX
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is January (22 days).
The month with the least sunshine days is September (11.9 days).
Average UV index in September
Leon Valley, 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
Leon Valley, TX
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Leon Valley, 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).
Leon Valley, Texas, USA
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