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September Weather in Gainesville, United States

Last updated: June 24, 2025

In September, the average temperature in Gainesville, United States reaches a warm 26°C (80°F). Expect a minimum of 17°C (63°F) and a maximum of 36°C (98°F). With an average humidity of 83%, the climate can feel quite steamy. Be prepared for some rain, as 124 mm (4.9 in) of precipitation is expected over about 15 days. Enjoy your stay!

September Temperature in Gainesville

In September in Gainesville, the average temperature is 26°C (80°F). The maximum can reach 36°C (98°F) and the minimum can be as low as 17°C (63°F). This makes it an ideal destination for travelers seeking warm weather and sunshine.

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 26°C (80°F), with highs reaching up to 36°C (98°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec566365707679818180756459
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 total precipitation amount is 124 mm (4.9 in) over a period of 15 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 124 mm (4.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec49634278100156176183124706485
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 83%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that can make traveling quite uncomfortable; you may find yourself needing frequent breaks for hydration and cool shade as the thick air clings to your skin.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%70%68%75%80%81%83%81%82%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec589111111111110975
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 Weather14°C (57°F)49 mm (1.9 inches)83%moderate
February Weather17°C (63°F)63 mm (2.5 inches)80%very high
March Weather18°C (65°F)42 mm (1.7 inches)75%very high
April Weather21°C (70°F)78 mm (3.1 inches)70%extreme
May Weather24°C (76°F)100 mm (3.9 inches)68%extreme
June Weather26°C (80°F)156 mm (6.1 inches)75%extreme
July Weather27°C (81°F)176 mm (6.9 inches)79%extreme
August Weather27°C (81°F)183 mm (7.2 inches)81%extreme
September Weather26°C (80°F)124 mm (4.9 inches)83%very high
October Weather24°C (75°F)70 mm (2.8 inches)81%very high
November Weather18°C (64°F)64 mm (2.5 inches)82%high
December Weather15°C (59°F)85 mm (3.3 inches)84%moderate

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