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September Weather in Leesburg, United States

Last updated: June 24, 2025

In September, the average temperature in Leesburg, United States hovers around 21°C (69°F). Expect a range from a chilly 6°C (42°F) to a warm 35°C (94°F). During this time, precipitation typically reaches 96 mm (3.8 in) over about 8 days, while humidity levels average around 73%, creating a distinctly refreshing environment.

September Temperature in Leesburg

In September in Leesburg, the average temperature is 21°C (69°F), with maximum temperatures reaching up to 35°C (94°F) and minimums dropping as low as 6°C (42°F). This diverse temperature range makes Leesburg an ideal destination for travelers seeking both warmth and cooler respite during their adventures.

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 21°C (69°F), with highs reaching up to 35°C (94°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec323644536472767469584338
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 96 mm (3.8 in) over the course of 8 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 96 mm (3.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec83111134130134140127899610397111
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 73%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat stifling and travel a bit more challenging, as the air is dense and can leave you feeling fatigued more quickly.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
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 Weather0°C (33°F)82 mm (3.2 inches)88%moderate
February Weather2°C (36°F)111 mm (4.4 inches)88%moderate
March Weather7°C (44°F)134 mm (5.3 inches)87%high
April Weather12°C (53°F)129 mm (5.1 inches)85%very high
May Weather18°C (65°F)134 mm (5.3 inches)81%very high
June Weather22°C (72°F)140 mm (5.5 inches)82%very high
July Weather24°C (76°F)126 mm (5.0 inches)81%very high
August Weather23°C (74°F)89 mm (3.5 inches)73%very high
September Weather21°C (69°F)96 mm (3.8 inches)73%very high
October Weather15°C (58°F)103 mm (4.1 inches)78%high
November Weather6°C (43°F)97 mm (3.8 inches)89%moderate
December Weather3°C (38°F)111 mm (4.4 inches)87%moderate

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