September weather forecast
Forest Hill, TX

Weather in September

September, the first month of the autumn, in Forest Hill, is still a hot month, with average temperature ranging between min 69.6°F (20.9°C) and max 87.4°F (30.8°C).

Temperature

In Forest Hill, the average high-temperature slightly decreases, from a sweltering 95.7°F (35.4°C) in August, to a tropical 87.4°F (30.8°C). In September, the average low-temperature is 69.6°F (20.9°C).

Heat index

In September, the average heat index is calculated to be a torrid 95.7°F (35.4°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, pregnancy, wind), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Forest Hill, the average relative humidity in September is 64%.

Rainfall

In Forest Hill, in September, during 14.9 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, in Forest Hill, there are 132.4 rainfall days, and 25.87" (657mm) of precipitation is accumulated.

Snowfall

March through October are months without snowfall in Forest Hill, Texas.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine in Forest Hill, Texas, 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 threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
[Resources]

FAQ

What is the temperature in September in Forest Hill?

The average high-temperature, in September, in Forest Hill, Texas, is 87.4°F (30.8°C), while the average low-temperature is 69.6°F (20.9°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 95.7°F (35.4°C).

What is the average humidity in September in Forest Hill?

The average relative humidity in September in Forest Hill, Texas, is 64%.

How many days does it rain in September in Forest Hill?

In Forest Hill, in September, it is raining for 14.9 days, with typically 2.44" (62mm) of accumulated precipitation.

When it does not snow in Forest Hill?

In Forest Hill, Texas, snow does not fall in March through October.

What is the average length of the day in September in Forest Hill?

In September, the average length of the day in Forest Hill, Texas, is 12.4h.

How many hours of sunshine does Forest Hill have in September?

In Forest Hill, the average sunshine in September is 8.5h.

How high is the UV index in September in Forest Hill?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Forest Hill, TX

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).

[Resources]

Average pressure in September
Forest Hill, TX

Average pressure in September - Forest Hill, TX
  • Average pressure in September: 29.97"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.9").

[Resources]

Average wind speed in September
Forest Hill, TX

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).

[Resources]

Average humidity in September
Forest Hill, TX

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%).

[Resources]

Average rainfall in September
Forest Hill, TX

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").

[Resources]

Average rainfall days in September
Forest Hill, TX

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).

[Resources]

Average snowfall in September
Forest Hill, TX

Average snowfall in September - Forest Hill, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.79").
Months with the least snowfall are March, April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Forest Hill, TX

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).
Months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Forest Hill, TX

Average daylight in September / Average sunshine in September - Forest Hill, TX
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 5.7h).

[Resources]

Average sunshine days in September
Forest Hill, TX

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).

[Resources]

Average UV index in September
Forest Hill, TX

Average UV index in September - Forest Hill, TX
  • Average UV index in September: 6

Months with the highest UV index are May, June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

[Resources]

Average cloud cover in September
Forest Hill, TX

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).

[Resources]

Average visibility in September
Forest Hill, TX

Average visibility in September - Forest Hill, TX
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location