September weather forecastRosharon, TX
September
Weather in September
The first month of the autumn, September, is also a hot month in Rosharon, Texas, with an average temperature fluctuating between 73.4°F (23°C) and 86.9°F (30.5°C).Temperature
Rosharon's weather in September, with an average high-temperature of a still tropical 86.9°F (30.5°C), subtly shifts from August's 91.9°F (33.3°C). Throughout the month of September, Rosharon witnesses an average low-temperature of 73.4°F (23°C).Heat index
For most parts of September, the heat index is evaluated at a very hot 100.4°F (38°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.Realize that the values for the heat index are set for shaded places and light winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
In Rosharon, the average relative humidity in September is 77%.Rainfall
September is the month with the most rainfall. Rain falls for 21 days and accumulates 5.63" (143mm) of precipitation.Snowfall
Months with snowfall are January, September and December. The months with the most snowfall are January, September and December, with an average 0.04" (1mm) of accumulated snow.Daylight
In Rosharon, the average length of the day in September is 12h and 20min.On the first day of September in Rosharon, sunrise is at 6:59 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:08 pm CDT.
Sunshine
In Rosharon, the average sunshine in September is 8.5h.UV index
In Rosharon, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 6 suggests this advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rosharon, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (61.3°F).
- Average low temperature in September: 73.4°F
The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (47.1°F).
Average pressure in September
Rosharon, 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 (29.93"Hg).
Average wind speed in September
Rosharon, TX
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are August and September (6.5mph).
Average humidity in September
Rosharon, TX
- Average humidity in September: 77%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Rosharon, TX
- Average rainfall in September: 5.63"
The wettest month (with the highest rainfall) is September (5.63").
The driest month (with the least rainfall) is February (1.73").
Average rainfall days in September
Rosharon, TX
- Average rainfall days in September: 21 days
The month with the highest number of rainy days is September (21 days).
The month with the least rainy days is January (11.9 days).
Average snowfall in September
Rosharon, TX
- Average snowfall in September: 0.04"
The months with the highest snowfall are January, September and December (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, October and November (0").
Average snowfall days in September
Rosharon, TX
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Rosharon, TX
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Rosharon, TX
- Average sunshine days in September: 7.5 days
The month with the most sunshine days is January (17.1 days).
The month with the least sunshine days is September (7.5 days).
Average UV index in September
Rosharon, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Rosharon, TX
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Rosharon, 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).
