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
In Round Top, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's torrid 95.5°F (35.3°C) to a tropical 88.3°F (31.3°C). Throughout the nights in September, Round Top experiences an average low-temperature of 71.1°F (21.7°C).Heat index
For September, the heat index is appraised at a sweltering 102.2°F (39°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.
Humidity
In Round Top, the average relative humidity in September is 73%.Rainfall
In Round Top, during September, the rain falls for 15.6 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Round Top, during the entire year, the rain falls for 139.2 days and collects up to 15.47" (393mm) of precipitation.Snowfall
In Round Top, snow does not fall in February through November.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 7:04 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:13 pm CDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Round Top, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Round Top have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Round Top, TX
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 71.1°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (43.7°F).
Average pressure in September
Round Top, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Round Top, TX
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is September (6mph).
Average humidity in September
Round Top, TX
- Average humidity in September: 73%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Round Top, TX
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days in September
Round Top, TX
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is September (15.6 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in September
Round Top, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Round Top, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 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
Round Top, 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 2min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Round Top, TX
- Average sunshine days in September: 11.7 days
The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is June (11 days).
Average UV index in September
Round Top, 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
Round Top, TX
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Round Top, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, August, September, October, November and December (6mi).
The months with the lowest visibility are May, June and July (5mi).
Round Top, Texas, USA
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