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
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a torrid 95.4°F (35.2°C) to a hot 88.7°F (31.5°C). In September, Brenham's temperature tends to fall to an average low of 70.5°F (21.4°C) during the night.Heat index
September's mean heat index is estimated at a blistering 104°F (40°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
In September, the average relative humidity in Brenham is 74%.Rainfall
In September, the rain falls for 16.1 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. Throughout the year, in Brenham, there are 141.3 rainfall days, and 17.4" (442mm) of precipitation is accumulated.Snowfall
February through November are months without snowfall.Daylight
The average length of the day in September in Brenham 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 of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
Is it hot in Brenham during September?
What is the average humidity in September in Brenham?
How many days does it rain in September in Brenham?
When it does not snow in Brenham?
What is the average length of the day in September in Brenham?
When are sunrise and sunset in September in Brenham?
How many hours of sunshine does Brenham have in September?
How high is the UV index in September in Brenham?
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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