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 brings a slight decrease in the average high-temperature, shifting from a hot 93.9°F (34.4°C) in August to a still tropical 86.7°F (30.4°C). During September, the average low-temperature is recorded at an agreeable 69.1°F (20.6°C).Heat index
September's average heat index is appraised at a sweltering 96.8°F (36°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
In September, the average relative humidity is 69%.Rainfall
In Boerne, Texas, in September, during 16.5 rainfall days, 3.27" (83mm) of precipitation is typically accumulated. In Boerne, during the entire year, the rain falls for 149.8 days and collects up to 23.94" (608mm) of precipitation.Snowfall
March through December are months without snowfall.Daylight
The average length of the day in September in Boerne 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, in Boerne, Texas, sunrise is at 7:28 am and sunset at 7:21 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Boerne, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 6 translates into these guidelines:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Boerne during September?
What is the average humidity in September in Boerne?
How many days does it rain in September in Boerne?
When it does not snow in Boerne?
What is the average length of the day in September in Boerne?
When are sunrise and sunset in September in Boerne?
How many hours of sunshine does Boerne have in September?
What is the UV index intensity in September in Boerne?
Average temperature in September
Boerne, TX
- Average high temperature in September: 86.7°F
The warmest month (with the highest average high temperature) is August (93.9°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 69.1°F
The month with the highest average low temperature is August (72.9°F).
The coldest month (with the lowest average low temperature) is January (41.9°F).
Average pressure in September
Boerne, 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 (29.89"Hg).
Average wind speed in September
Boerne, TX
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is March (9.7mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in September
Boerne, TX
- Average humidity in September: 69%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Boerne, TX
- Average rainfall in September: 3.27"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in September
Boerne, TX
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in September
Boerne, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Boerne, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and December (0 days).
Average daylight in September /
Average sunshine in September
Boerne, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are November and December (Average sunshine: 5h and 36min).
Average sunshine days in September
Boerne, TX
- Average sunshine days in September: 11 days
The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in September
Boerne, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Boerne, TX
- Average cloud cover in September: 34
The month with the most cloud cover is May (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Boerne, 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).
Boerne, Texas, USA
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