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
September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's very hot 95.7°F (35.4°C) to a tropical 87.4°F (30.8°C). Forest Hill records an average nighttime low of 69.6°F (20.9°C) in September.Heat index
For most parts of September, the heat index is calculated to be a fiery hot 95°F (35°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
The average relative humidity in September is 64%.Rainfall
In Forest Hill, during September, the rain falls for 14.9 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Forest Hill, Texas, during the entire year, the rain falls for 132.4 days and collects up to 25.87" (657mm) of precipitation.Snowfall
March through October are months without snowfall.Daylight
In Forest Hill, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:04 am and sunset at 7:53 pm. On the last day of September, in Forest Hill, Texas, sunrise is at 7:23 am and sunset at 7:14 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index in Forest Hill is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Forest Hill?
What is the average humidity in September in Forest Hill?
How much does it rain in Forest Hill in September?
When it does not snow in Forest Hill?
What is the average length of the day in September in Forest Hill?
When is the sunrise / sunset in September in Forest Hill?
How many hours of sunshine does Forest Hill have in September?
What is the UV index intensity in September in Forest Hill?
Average temperature in September
Forest Hill, TX
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is August (95.7°F).
The month with the lowest average high temperature is January (55.4°F).
- Average low temperature in September: 69.6°F
The month with the highest average low temperature is August (75.9°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).
Average pressure in September
Forest Hill, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Forest Hill, TX
- Average wind speed in September: 6.7mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is September (6.7mph).
Average humidity in September
Forest Hill, TX
- Average humidity in September: 64%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Forest Hill, TX
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is October (3.35").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in September
Forest Hill, TX
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is September (14.9 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Forest Hill, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in September
Forest Hill, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Forest Hill, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Forest Hill, TX
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is January (24.2 days).
The month with the least sunshine days is September (13.2 days).
Average UV index in September
Forest Hill, 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 and December (UV index 3).
Average cloud cover in September
Forest Hill, TX
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Forest Hill, 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).
Forest Hill, Texas, USA
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