September weather forecastStar Harbor, TX
September
Weather in September
September, the first month of the autumn in Star Harbor, is still a hot month, with temperature in the range of an average high of 88.7°F (31.5°C) and an average low of 68.9°F (20.5°C).Temperature
In the transition to September, Star Harbor observes a minor drop in the average high-temperature, shifting from a torrid 95.7°F (35.4°C) in August to a hot 88.7°F (31.5°C). Star Harbor experiences a consistent average temperature of 68.9°F (20.5°C) throughout the nights in September.Heat index
During September, the heat index is estimated at a very hot 100.4°F (38°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
In Star Harbor, the average relative humidity in September is 68%.Rainfall
In September, the rain falls for 10.2 days. Throughout September, 0.67" (17mm) of precipitation is accumulated. In Star Harbor, during the entire year, the rain falls for 101.3 days and collects up to 10.59" (269mm) of precipitation.Snowfall
In Star Harbor, Texas, snow does not fall in March through December.Daylight
In Star Harbor, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 6:59 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:09 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September in Star Harbor is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 6 during September leads to these advisories:
Take precautions against overexposure. Protection against sun damage is needed. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Star Harbor, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (95.7°F).
The month with the lowest average high temperature is January (55.2°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is August (74.5°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).
Average pressure in September
Star Harbor, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Star Harbor, TX
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is September (6mph).
Average humidity in September
Star Harbor, TX
- Average humidity in September: 68%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (62%).
Average rainfall in September
Star Harbor, TX
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is May (1.42").
The driest months (with the least rainfall) are January and November (0.55").
Average rainfall days in September
Star Harbor, TX
- Average rainfall days in September: 10.2 days
The months with the highest number of rainy days are May and September (10.2 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Star Harbor, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.16").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Star Harbor, 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 April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Star Harbor, TX
- Average daylight in September: 12h and 24min
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 36min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Star Harbor, TX
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is September (15.7 days).
Average UV index in September
Star Harbor, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in September
Star Harbor, TX
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Star Harbor, 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).
