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September Weather in Leesburg, United States

Last updated: June 24, 2025

In Leesburg, United States, the average temperature in September hovers around 20°C (68°F). While you can expect some warmth, the range can vary significantly, dipping to a chilly 4°C (39°F) and soaring to a sweltering 33°C (91°F). Be prepared for 74 mm (2.9 in) of precipitation spread over 9 days, contributing to an average humidity level of 78%.

September Temperature in Leesburg

In September in Leesburg, the average temperature is 20°C (68°F). Maximums can reach 33°C (91°F) and minimums can be as low as 4°C (39°F). This makes Leesburg a great destination for travelers looking to enjoy a mild climate with a variety of temperature experiences.

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

The chart illustrates September temperature patterns in Leesburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leesburg, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (91°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec282940496272757367554034
Data source: Temperature data for Leesburg 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 Leesburg

In Leesburg in September, the precipitation amount is 74 mm (2.9 in), which occurs over a span of 9 days.

September Precipitation Trends in Leesburg

The chart displays monthly precipitation patterns in Leesburg, 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 Leesburg, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec737710597134113116104741138162
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Leesburg

In Leesburg in September humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

September Average Humidity in Leesburg

This chart illustrates the average monthly humidity levels in Leesburg, 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 Leesburg is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Leesburg

In Leesburg in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Leesburg.

Maximum UV Index Levels in Leesburg for September

The chart shows the monthly maximum UV Index (UVI) for Leesburg 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 Leesburg typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098642
Data source: Leesburg 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 Leesburg Compares to Other Months

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

This table compares monthly weather conditions in Leesburg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)73 mm (2.9 inches)85%moderate
February Weather-1°C (30°F)77 mm (3.0 inches)85%moderate
March Weather4°C (40°F)105 mm (4.1 inches)86%high
April Weather9°C (49°F)97 mm (3.8 inches)87%very high
May Weather16°C (62°F)134 mm (5.3 inches)81%very high
June Weather22°C (72°F)113 mm (4.4 inches)82%very high
July Weather24°C (76°F)116 mm (4.6 inches)81%very high
August Weather23°C (73°F)103 mm (4.1 inches)79%very high
September Weather20°C (68°F)74 mm (2.9 inches)78%very high
October Weather13°C (56°F)113 mm (4.5 inches)81%high
November Weather5°C (40°F)80 mm (3.2 inches)89%moderate
December Weather1°C (34°F)62 mm (2.5 inches)86%low

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