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
In Porter, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's fiery hot 95.2°F (35.1°C) to a hot 89.1°F (31.7°C). September brings Porter a consistent average low-temperature of 71.2°F (21.8°C).Heat index
The heat index value for September is computed to be a blisteringly hot 105.8°F (41°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.Metrics for the heat index primarily focus on shaded spots and light wind conditions. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. 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 human body cools itself through perspiration, as excessive warmth is removed from the body 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. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.
Humidity
The average relative humidity in September is 75%.Rainfall
In Porter, during September, the rain falls for 17.2 days and regularly aggregates up to 2.17" (55mm) of precipitation. Throughout the year, there are 148.3 rainfall days, and 20.04" (509mm) of precipitation is accumulated.Snowfall
In Porter, snow does not fall in January through November.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:58 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:07 pm CDT.
Sunshine
In Porter, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, an average UV index of 6 transforms into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September in Porter?
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 Porter have in September?
How high is the UV index in September?
Average temperature in September
Porter, TX
- Average high temperature in September: 89.1°F
The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (60.1°F).
- Average low temperature in September: 71.2°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 (43.5°F).
Average pressure in September
Porter, 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
Porter, TX
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is September (5.2mph).
Average humidity in September
Porter, TX
- Average humidity in September: 75%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (71%).
Average rainfall in September
Porter, TX
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is November (0.98").
Average rainfall days in September
Porter, TX
- Average rainfall days in September: 17.2 days
The month with the highest number of rainy days is September (17.2 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Porter, TX
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Porter, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Porter, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Porter, TX
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is September (10.3 days).
Average UV index in September
Porter, 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
Porter, TX
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Porter, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, June, August, September, October, November and December (6mi).
The months with the lowest visibility are February, March, April, May and July (5mi).
Porter, Texas, USA
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