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 ushers in a minor alteration in Llano's climate, with the average high-temperature moving from August's sweltering 95°F (35°C) to a hot 86.9°F (30.5°C). Llano's average low-temperature in September is measured at an agreeable 68.9°F (20.5°C).Heat index
Throughout September, the heat index is appraised at a fiery hot 95°F (35°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting 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
The average relative humidity in September in Llano, Texas, is 65%.Rainfall
In Llano, Texas, in September, during 13.3 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. In Llano, during the entire year, the rain falls for 123.8 days and collects up to 21.18" (538mm) of precipitation.Snowfall
In Llano, Texas, snow does not fall in March through November.Daylight
The average length of the day in September in Llano, Texas, is 12h and 20min.On the first day of the month, sunrise is at 7:11 am and sunset at 7:57 pm. On the last day of September, in Llano, sunrise is at 7:28 am and sunset at 7:20 pm CDT.
Sunshine
In Llano, the average sunshine in September is 8.5h.UV index
In Llano, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 6 in September transforms into this advice:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Frequently asked questions
How hot does it get in Llano in September?
What is the average humidity in September in Llano?
How much does it rain in Llano in September?
When it does not snow in Llano?
How many hours of daylight does Llano have in September?
When is the sunrise / sunset in September in Llano?
How long on average sun shines in September in Llano?
What is the UV index intensity in September in Llano?
Average temperature in September
Llano, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in September
Llano, 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 (29.9"Hg).
Average wind speed in September
Llano, TX
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in September
Llano, TX
- Average humidity in September: 65%
The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Llano, TX
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in September
Llano, TX
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Llano, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Llano, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Llano, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are November and December (Average sunshine: 5h and 42min).
Average sunshine days in September
Llano, TX
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in September
Llano, 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
Llano, TX
- Average cloud cover in September: 31
The month with the most cloud cover is May (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Llano, 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).
Llano, Texas, USA
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