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 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 an average high-temperature of a still tropical 90.3°F (32.4°C), nearly identical to the preceding month. September nights are marked by an average temperature drop to a moderately hot 78.6°F (25.9°C).Heat index
During September, the heat index is appraised at an extremely hot 105.8°F (41°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of 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 significant for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In September, the average relative humidity is 69%.Rainfall
September is the month with the most rainfall in Rancho Viejo. Rain falls for 17.6 days and accumulates 2.6" (66mm) of precipitation.Snowfall
In Rancho Viejo, snow does not fall in January, March through December.Daylight
In Rancho Viejo, the average length of the day in September is 12h and 18min.On the first day of the month, sunrise is at 7:10 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:17 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 7 during September morphs into the following directions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
What is the rainiest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Rancho Viejo have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Rancho Viejo, TX
- Average high temperature in September: 90.3°F
The warmest month (with the highest average high temperature) is August (94.1°F).
The month with the lowest average high temperature is January (68.7°F).
- Average low temperature in September: 78.6°F
The month with the highest average low temperature is August (80.2°F).
The coldest month (with the lowest average low temperature) is January (56.5°F).
Average pressure in September
Rancho Viejo, TX
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are May and June (29.88"Hg).
Average wind speed in September
Rancho Viejo, TX
- Average wind speed in September: 8.9mph
The windiest months (with the highest average wind speed) are March and April (12.3mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).
Average humidity in September
Rancho Viejo, TX
- Average humidity in September: 69%
The month with the highest relative humidity is December (74%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Rancho Viejo, TX
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is September (2.6").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days in September
Rancho Viejo, TX
- Average rainfall days in September: 17.6 days
The month with the highest number of rainy days is September (17.6 days).
The month with the least rainy days is July (8.5 days).
Average snowfall days in September
Rancho Viejo, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Rancho Viejo, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Rancho Viejo, TX
- Average sunshine days in September: 9.9 days
The month with the most sunshine days is May (20 days).
The month with the least sunshine days is September (9.9 days).
Average UV index in September
Rancho Viejo, TX
- Average UV index in September: 7
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Rancho Viejo, TX
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Rancho Viejo, 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).
Rancho Viejo, Texas, USA
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