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September Weather in Gainesville, United States

Last updated: June 24, 2025

In September, the average temperature in Gainesville, United States hovers around 25°C (77°F), making it a delightful time to visit. Expect temperatures to range from a cool 9°C (49°F) at night to a warm 37°C (98°F) during the day. With an average humidity of 65%, the air can feel quite comfortable. Just be prepared for some rain, as there’s an estimated 99 mm (3.9 in) of precipitation over about 7 days!

September Temperature in Gainesville

In September in Gainesville, the average temperature is 25°C (77°F). Maximum can reach 37°C (98°F) and minimum can be as low as 9°C (49°F). Be sure to pack for both warm days and cool evenings when traveling to Gainesville during this time.

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

The chart illustrates September temperature patterns in Gainesville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gainesville, September typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (98°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec444658637380848377655449
Data source: Temperature data for Gainesville 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 Gainesville

In Gainesville in September, the precipitation amount is 99 mm (3.9 in) over a period of 7 days.

September Precipitation Trends in Gainesville

The chart displays monthly precipitation patterns in Gainesville, 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 Gainesville, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec537993981211004390991294755
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Gainesville

In Gainesville in September, humidity is 65%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making outdoor activities slightly uncomfortable but still bearable, as the sticky air clings to your skin and encourages you to seek shade or a refreshing drink.

September Average Humidity in Gainesville

This chart illustrates the average monthly humidity levels in Gainesville, 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 Gainesville 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 Gainesville

In Gainesville 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 Gainesville.

Maximum UV Index Levels in Gainesville for September

The chart shows the monthly maximum UV Index (UVI) for Gainesville 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 Gainesville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Gainesville 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 Gainesville Compares to Other Months

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

This table compares monthly weather conditions in Gainesville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)53 mm (2.1 inches)80%moderate
February Weather8°C (47°F)79 mm (3.1 inches)79%high
March Weather14°C (58°F)93 mm (3.7 inches)78%very high
April Weather17°C (63°F)98 mm (3.9 inches)78%very high
May Weather23°C (73°F)121 mm (4.8 inches)81%extreme
June Weather27°C (80°F)100 mm (3.9 inches)78%extreme
July Weather29°C (84°F)43 mm (1.7 inches)73%extreme
August Weather28°C (83°F)90 mm (3.5 inches)66%extreme
September Weather25°C (77°F)99 mm (3.9 inches)65%very high
October Weather19°C (66°F)129 mm (5.1 inches)72%very high
November Weather12°C (54°F)47 mm (1.9 inches)82%high
December Weather9°C (49°F)55 mm (2.1 inches)87%moderate

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