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
The arrival of September suggests a slight decrease in the average high-temperature, moving from a very hot 95.9°F (35.5°C) in August to a tropical 87.4°F (30.8°C). Nighttime temperatures consistently average a pleasant 70.2°F (21.2°C) during September.Heat index
In September, the heat index is calculated to be a very hot 95°F (35°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.Research indicates the heat index considers values in shaded locales and with light winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
The average relative humidity in September is 63%.Rainfall
In Walnut Springs, in September, it is raining for 13.9 days, with typically 2.01" (51mm) of accumulated precipitation. In Walnut Springs, during the entire year, the rain falls for 125.3 days and collects up to 24.25" (616mm) of precipitation.Snowfall
January, March through November are months without snowfall.Daylight
In Walnut Springs, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 7:06 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:16 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September in Walnut Springs is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Walnut Springs?
What is the average humidity in September?
How much does it rain in Walnut Springs in September?
When it does not snow in Walnut Springs?
How many hours of daylight does Walnut Springs have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Walnut Springs, TX
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (56.7°F).
- Average low temperature in September: 70.2°F
The month with the highest average low temperature is August (75.9°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).
Average pressure in September
Walnut Springs, TX
- Average pressure in September: 29.97"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
Walnut Springs, TX
- Average wind speed in September: 7.1mph
The windiest months (with the highest average wind speed) are March and April (10.9mph).
The calmest month (with the lowest average wind speed) is September (7.1mph).
Average humidity in September
Walnut Springs, TX
- Average humidity in September: 63%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Walnut Springs, TX
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is October (3.31").
The driest month (with the least rainfall) is November (1.06").
Average rainfall days in September
Walnut Springs, TX
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Walnut Springs, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Walnut Springs, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Walnut Springs, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Walnut Springs, TX
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is September (14.5 days).
Average UV index in September
Walnut Springs, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Walnut Springs, TX
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Walnut Springs, 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).
Walnut Springs, Texas, USA
Weather forecast for your location
2. Allow the app to use your location