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, a minor reduction in average high-temperature is observed, shifting from a sweltering 100.6°F (38.1°C) in August to a tropical 92.8°F (33.8°C). During the month of September, the nighttime temperature falls to an average of 76.6°F (24.8°C).Heat index
The heat index in September is calculated to be a blistering 107.6°F (42°C). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
In September, the average relative humidity in San Ygnacio is 60%.Rainfall
The month with the most rainfall is September, when the rain falls for 15.8 days and typically aggregates up to 2.83" (72mm) of precipitation.Snowfall
January through November are months without snowfall in San Ygnacio.Daylight
In September, the average length of the day in San Ygnacio, Texas, is 12h and 18min.On the first day of the month, sunrise is at 7:17 am and sunset at 7:57 pm. On the last day of September, in San Ygnacio, Texas, sunrise is at 7:30 am and sunset at 7:24 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In San Ygnacio, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 7 suggests this advice:
Ward off overexposure. Defence against solar harm is crucial. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
How hot does it get in San Ygnacio in September?
What is the average humidity in September in San Ygnacio?
What is the rainiest month in San Ygnacio?
How many days does it rain in September in San Ygnacio?
When it does not snow in San Ygnacio?
What is the average length of the day in September in San Ygnacio?
When is the sunrise / sunset in September in San Ygnacio?
How many hours of sunshine does San Ygnacio have in September?
What is the UV index reading in September in San Ygnacio?
Average temperature in September
San Ygnacio, TX
- Average high temperature in September: 92.8°F
The warmest month (with the highest average high temperature) is August (100.6°F).
The month with the lowest average high temperature is January (68.5°F).
- Average low temperature in September: 76.6°F
The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is January (51.8°F).
Average pressure in September
San Ygnacio, TX
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are May and June (29.86"Hg).
Average wind speed in September
San Ygnacio, TX
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is July (14.5mph).
The calmest month (with the lowest average wind speed) is December (8.8mph).
Average humidity in September
San Ygnacio, TX
- Average humidity in September: 60%
The month with the highest relative humidity is December (62%).
The month with the lowest relative humidity is August (50%).
Average rainfall in September
San Ygnacio, TX
- Average rainfall in September: 2.83"
The wettest month (with the highest rainfall) is September (2.83").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in September
San Ygnacio, TX
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is September (15.8 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in September
San Ygnacio, TX
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
San Ygnacio, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.1 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
San Ygnacio, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
San Ygnacio, TX
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is September (12.8 days).
Average UV index in September
San Ygnacio, TX
- Average UV index in September: 7
The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
San Ygnacio, TX
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 34).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
San Ygnacio, 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).
San Ygnacio, Texas, USA
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