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
September's onset introduces a mild reduction in the average high-temperature, from a torrid 100.6°F (38.1°C) in August to a tropical 92.8°F (33.8°C). An average nighttime temperature of 76.6°F (24.8°C) is observed during September.Heat index
September's heat index is calculated to be a blistering 107.6°F (42°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
The average relative humidity in September 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.Daylight
The average length of the day in September 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, 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 September, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 7 during September translates into the following directions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. 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. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
What is the wettest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does San Ygnacio have in September?
What is the UV index intensity in September?
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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