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
As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a very hot 95.4°F (35.2°C) to a hot 88.7°F (31.5°C). Brenham's nights in September experience an average temperature drop to a pleasant 70.5°F (21.4°C).Heat index
During September, the heat index is appraised at a blisteringly hot 104°F (40°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.
Humidity
In Brenham, the average relative humidity in September is 74%.Rainfall
In Brenham, in September, during 16.1 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, in Brenham, there are 141.3 rainfall days, and 17.4" (442mm) of precipitation is accumulated.Snowfall
In Brenham, snow does not fall in February through November.Daylight
In Brenham, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:02 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:11 pm CDT.
Sunshine
In Brenham, the average sunshine in September is 8.6h.UV index
In Brenham, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in Brenham in September?
When it does not snow?
How many hours of daylight does Brenham have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Brenham have in September?
What is the UV index reading in September?
Average temperature in September
Brenham, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (95.4°F).
The month with the lowest average high temperature is January (59.2°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in September
Brenham, 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
Brenham, TX
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are February and March (8.5mph).
The calmest month (with the lowest average wind speed) is September (5.8mph).
Average humidity in September
Brenham, TX
- Average humidity in September: 74%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Brenham, TX
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (3.03").
The driest months (with the least rainfall) are February and November (0.83").
Average rainfall days in September
Brenham, TX
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is September (16.1 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Brenham, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Brenham, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Brenham, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Brenham, TX
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is January (19.2 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Brenham, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Brenham, TX
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Brenham, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, August, September, October, November and December (6mi).
The months with the lowest visibility are May, June and July (5mi).
Brenham, Texas, USA
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