September Weather in Flower Mound

Last updated: March 2, 2024

The weather in Flower Mound, United States, during September is characterized by an average temperature of 26°C (79°F). Highs can soar to 36°C (98°F), while lows may dip to 15°C (59°F). Typically, the humidity level in Flower Mound throughout September hovers around 65%.

15°C (59°F)

Minimum temperature

26°C (79°F)

Average temperature

36°C (98°F)

Maximum temperature

65%

Humidity

Precipitation and Sunshine hours

In September, Flower Mound averages 89 mm (3.5 inches) of rainfall, typically over the course of 8 rainy days. The month enjoys an average of 12 hours 19 minutes of daylight, with the sun shining for approximately 9 hours 23 minutes each day. Additionally, there is a 68% probability of sunny days during this period.

89 mm (3.5 inches)

Precipitation

8 rainy days

Rainy days

9 hours 23 minutes

Sunshine hours

68%

Chance of sun

UV Index

In September, the UV Index in Flower Mound reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 0 1 2 4 6 8 9 9 8 5 3 1 1
Exposure Low Moderate High VeryHigh Moderate Low
Time to burn 45 min 30 min 25 min 15 min 30 min 45 min

Compare Flower Mound's Climate with Cities Worldwide