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September Weather in Forney, United States

Last updated: June 24, 2025

In September, the average temperature in Forney, United States hovers around 26°C (80°F), providing a warm and inviting climate. However, temperatures can vary significantly, dipping to a minimum of 11°C (51°F) and soaring to a maximum of 38°C (100°F). During this month, expect 86 mm (3.4 in) of precipitation over about 8 days, contributing to an average humidity of 65%.

September Temperature in Forney

In September in Forney, the average temperature is 26°C (80°F). The maximum can reach 38°C (100°F) and the minimum can be as low as 11°C (51°F). This makes Forney a great destination for travelers seeking warm weather, but be prepared for cooler evenings.

September Weather in Forney: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Forney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forney, September typically has an average temperature of 26°C (80°F), with highs reaching up to 38°C (100°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec474960657481858479685752
Data source: Temperature data for Forney generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Forney

In Forney in September, the precipitation amount reaches 86 mm (3.4 in) over the course of 8 days.

September Precipitation Trends in Forney

The chart displays monthly precipitation patterns in Forney, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Forney, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec65111117138181975697861445574
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Forney

In Forney in September humidity is 65%. With an average temperature of 26°C (80°F), this humidity feels like a warm, sticky embrace, making travel less comfortable as you navigate the sights.

September Average Humidity in Forney

This chart illustrates the average monthly humidity levels in Forney, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Forney is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Forney

In Forney in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Forney.

Maximum UV Index Levels in Forney for September

The chart shows the monthly maximum UV Index (UVI) for Forney in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Forney typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Forney September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Forney Compares to Other Months

Weather in Forney varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Forney, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Forney, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)65 mm (2.6 inches)80%moderate
February Weather10°C (50°F)111 mm (4.4 inches)79%high
March Weather16°C (61°F)117 mm (4.6 inches)78%very high
April Weather18°C (65°F)138 mm (5.4 inches)78%very high
May Weather23°C (75°F)181 mm (7.1 inches)81%extreme
June Weather27°C (82°F)97 mm (3.8 inches)78%extreme
July Weather29°C (85°F)56 mm (2.2 inches)73%extreme
August Weather29°C (85°F)97 mm (3.8 inches)66%extreme
September Weather26°C (80°F)86 mm (3.4 inches)65%very high
October Weather20°C (68°F)144 mm (5.7 inches)72%very high
November Weather14°C (57°F)55 mm (2.2 inches)82%high
December Weather11°C (52°F)74 mm (2.9 inches)87%moderate

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