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 in Round Rock, Texas, reveals a small adjustment in temperature, transitioning from an average high of a very hot 96.1°F (35.6°C) in August to a hot 88.2°F (31.2°C). Throughout September, an average nighttime temperature of 70.9°F (21.6°C) is experienced.Heat index
September's mean heat index is computed to be a very hot 98.6°F (37°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.Records show heat index calculations are tailored for shaded regions and mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
In September, the average relative humidity is 67%.Rainfall
In Round Rock, during September, the rain falls for 15.1 days and regularly aggregates up to 3.11" (79mm) of precipitation. Throughout the year, in Round Rock, Texas, there are 139.3 rainfall days, and 26.18" (665mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall in Round Rock.Daylight
The average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 7:07 am and sunset at 7:53 pm. On the last day of September, in Round Rock, sunrise is at 7:24 am and sunset at 7:16 pm CDT.
Sunshine
The average sunshine in September in Round Rock is 8.3h.UV index
In Round Rock, Texas, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 6 suggests these recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Round Rock in September?
What is the average humidity in September in Round Rock?
How much does it rain in Round Rock in September?
When it does not snow in Round Rock?
How many hours of daylight does Round Rock have in September?
What time are sunrise and sunset in September in Round Rock?
How long on average sun shines in September in Round Rock?
What is the UV index reading in September in Round Rock?
Average temperature in September
Round Rock, TX
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in September: 70.9°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Round Rock, 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 (29.91"Hg).
Average wind speed in September
Round Rock, TX
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is March (9.8mph).
The calmest month (with the lowest average wind speed) is September (6.5mph).
Average humidity in September
Round Rock, TX
- Average humidity in September: 67%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Round Rock, TX
- Average rainfall in September: 3.11"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in September
Round Rock, TX
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Round Rock, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Round Rock, 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
Round Rock, 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 July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Round Rock, TX
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is January (21.1 days).
The months with the least sunshine days are April, May and September (13.3 days).
Average UV index in September
Round Rock, 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 Rock, TX
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Round Rock, 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).
Round Rock, Texas, USA
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