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
In Rosenberg, the average high-temperature in September slightly decreases from 93.7°F (34.3°C) in August to a still hot 88°F (31.1°C). Throughout the month of September, Rosenberg witnesses an average temperature of 72°F (22.2°C).Heat index
The average heat index in September is computed to be a blistering 104°F (40°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
In Rosenberg, the average relative humidity in September is 77%.Rainfall
In Rosenberg, during September, the rain falls for 14.7 days and regularly aggregates up to 1.54" (39mm) of precipitation. In Rosenberg, during the entire year, the rain falls for 120.1 days and collects up to 12.01" (305mm) of precipitation.Snowfall
In Rosenberg, snow does not fall in March through December.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:01 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:09 pm CDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 6 in September translates into these instructions:
Shun overexposure. Protection from sun ravages is indispensable. 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. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Rosenberg have in September?
What is the UV index reading in September?
Average temperature in September
Rosenberg, TX
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is August (93.7°F).
The month with the lowest average high temperature is January (61.3°F).
- Average low temperature in September: 72°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).
Average pressure in September
Rosenberg, 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
Rosenberg, TX
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).
Average humidity in September
Rosenberg, TX
- Average humidity in September: 77%
The months with the highest relative humidity are February and March (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Rosenberg, TX
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is August (1.57").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in September
Rosenberg, TX
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is December (6.4 days).
Average snowfall days in September
Rosenberg, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Rosenberg, TX
- Average daylight in September: 12h and 2min
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 2min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Rosenberg, TX
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is September (12.6 days).
Average UV index in September
Rosenberg, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Rosenberg, TX
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are August and October (Cloud cover 30).
Average visibility in September
Rosenberg, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Rosenberg, Texas, USA
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