September weather forecast
Fort Worth, TX

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A calm river flowing down towards the beautiful cityscape of Fort Worth, Texas
A calm river flowing down towards the beautiful cityscape of Fort Worth, Texas

Weather in September

With the arrival of September, Fort Worth begins its transition into autumn. Rainfall increases marginally to 2.44" (62mm), while humidity tends to stay consistent compared to August. Fall's onset is marked by vibrant hues in nature, making the city particularly photogenic. Mid-September to October is typically regarded as transition period, with both foliage and temperatures changing dramatically. Gradual cooling and the return of regular rainfall highlight the end of the summer season.

Temperature

The arrival of September corresponds with a light shift in temperature, down from a fiery hot 95.7°F (35.4°C) in August to a tropical 87.4°F (30.8°C). Fort Worth registers a consistent average low-temperature of 69.6°F (20.9°C) during September.

Heat index

The average heat index in September is calculated to be a torrid 95°F (35°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

In September, the average relative humidity is 64%.

Rainfall

In September, the rain falls for 14.9 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. In Fort Worth, 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 Fort Worth, 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, sunrise is at 7:23 am and sunset at 7:14 pm CDT.

Sunshine

In Fort Worth, the average sunshine in September is 8.5h.

UV index

In Fort Worth, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the maximum UV index of 6 translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is September?

In September, the average high-temperature and low-temperature are 87.4°F (30.8°C) and 69.6°F (20.9°C) respectively. In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is calculated to be 95°F (35°C).

What is the average humidity in September?

In September, the average relative humidity is 64%.

How much does it rain in September?

In September, the rain falls for 14.9 days. Throughout September, 2.44" (62mm) of precipitation is accumulated.

When it does not snow in Fort Worth?

In Fort Worth, snow does not fall in March through October.

What is the average length of the day in September?

In September, the average day length in Fort Worth is 12h and 22min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 7:04 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:14 pm CDT.

How many hours of sunshine does Fort Worth have in September?

The average sunshine duration in September is 8.5h.

How high is the UV index in September?

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Fort Worth, TX

Average temperature in September - Fort Worth, 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
Fort Worth, TX

Average pressure in September - Fort Worth, 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
Fort Worth, TX

Average wind speed in September - Fort Worth, 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
Fort Worth, TX

Average humidity in September - Fort Worth, 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
Fort Worth, TX

Average rainfall in September - Fort Worth, 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
Fort Worth, TX

Average rainfall days in September - Fort Worth, 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
Fort Worth, TX

Average snowfall in September - Fort Worth, 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
Fort Worth, TX

Average snowfall days in September - Fort Worth, 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
Fort Worth, TX

Average daylight in September / Average sunshine in September - Fort Worth, 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
Fort Worth, TX

Average sunshine days in September - Fort Worth, 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
Fort Worth, TX

Average UV index in September - Fort Worth, 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
Fort Worth, TX

Average cloud cover in September - Fort Worth, 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
Fort Worth, TX

Average visibility in September - Fort Worth, 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).

Fort Worth, Texas, USA

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