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 Crystal City, the average high-temperature in September gently drops from a torrid 99.1°F (37.3°C) in August to a tropical 91.4°F (33°C). Throughout the month of September, Crystal City reports a steady low-temperature average of 74.5°F (23.6°C).Heat index
The heat index in September is estimated at a scorching 104°F (40°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
The average relative humidity in September is 60%.Rainfall
In Crystal City, in September, during 14.5 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Crystal City, during the entire year, the rain falls for 101.5 days and collects up to 12.48" (317mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 19min.On the first day of September, sunrise is at 7:17 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:25 pm CDT.
Sunshine
In Crystal City, Texas, the average sunshine in September is 8.6h.UV index
In Crystal City, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, an average UV index of 7 transforms into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Crystal City in September?
What is the average humidity in September in Crystal City?
How much does it rain in Crystal City in September?
When it does not snow in Crystal City?
What is the average length of the day in September in Crystal City?
What time are sunrise and sunset in September in Crystal City?
How long on average sun shines in September in Crystal City?
How high is the UV index in September in Crystal City?
Average temperature in September
Crystal City, TX
- Average high temperature in September: 91.4°F
The warmest month (with the highest average high temperature) is August (99.1°F).
The month with the lowest average high temperature is January (64.8°F).
- Average low temperature in September: 74.5°F
The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in September
Crystal City, TX
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are May and June (29.88"Hg).
Average wind speed in September
Crystal City, TX
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is May (10.9mph).
The calmest month (with the lowest average wind speed) is December (7mph).
Average humidity in September
Crystal City, TX
- Average humidity in September: 60%
The month with the highest relative humidity is November (64%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Crystal City, TX
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Crystal City, TX
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is September (14.5 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in September
Crystal City, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Crystal City, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and December (0 days).
Average daylight in September /
Average sunshine in September
Crystal City, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Crystal City, TX
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is September (13.9 days).
Average UV index in September
Crystal City, TX
- Average UV index in September: 7
The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Crystal City, TX
- Average cloud cover in September: 30
The months with the most cloud cover are March and May (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Crystal City, 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).
Crystal City, Texas, USA
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