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September Weather in Forest Hill, United States

Last updated: June 24, 2025

In Forest Hill, United States, the average temperature in September is a warm 26°C (79°F). Expect temperatures to range from a cool 10°C (50°F) to a scorching 38°C (101°F). During this month, you'll encounter about 68 mm (2.7 in) of precipitation over 8 days, accompanied by an average humidity level of 65%.

September Temperature in Forest Hill

In September in Forest Hill, the average temperature is 26°C (79°F), with maximums reaching as high as 38°C (101°F) and minimums dropping to as low as 10°C (50°F). Travelers should be prepared for warm days and cool nights during their visit.

September Weather in Forest Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Forest Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forest Hill, September typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec474961657582858579685751
Data source: Temperature data for Forest Hill 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 Forest Hill

In Forest Hill in September, the precipitation amount is 68 mm (2.7 in) spread over 8 days.

September Precipitation Trends in Forest Hill

The chart displays monthly precipitation patterns in Forest Hill, 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 Forest Hill, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec468795991491003688681345351
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Forest Hill

In Forest Hill in September, humidity is 65%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making travel quite sticky and uncomfortable.

September Average Humidity in Forest Hill

This chart illustrates the average monthly humidity levels in Forest Hill, 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 Forest Hill 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 Forest Hill

In Forest Hill 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 Forest Hill.

Maximum UV Index Levels in Forest Hill for September

The chart shows the monthly maximum UV Index (UVI) for Forest Hill 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 Forest Hill typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Forest Hill 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 Forest Hill Compares to Other Months

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

This table compares monthly weather conditions in Forest Hill, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)46 mm (1.8 inches)80%moderate
February Weather9°C (49°F)87 mm (3.4 inches)79%high
March Weather16°C (61°F)95 mm (3.8 inches)78%very high
April Weather18°C (66°F)99 mm (3.9 inches)78%very high
May Weather24°C (75°F)149 mm (5.9 inches)81%extreme
June Weather28°C (82°F)99 mm (3.9 inches)78%extreme
July Weather30°C (86°F)36 mm (1.4 inches)73%extreme
August Weather29°C (85°F)88 mm (3.5 inches)66%extreme
September Weather26°C (79°F)68 mm (2.7 inches)65%very high
October Weather20°C (68°F)134 mm (5.3 inches)72%very high
November Weather14°C (57°F)53 mm (2.1 inches)82%high
December Weather11°C (52°F)51 mm (2.0 inches)87%moderate

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