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September Weather in Alexandria, United States

Last updated: June 24, 2025

In Alexandria, United States, the average temperature in September reaches a pleasant 23°C (74°F). However, be prepared for a temperature range that can swing from a cool 7°C (45°F) to a sizzling 36°C (97°F). During this time, expect about 136 mm (5.4 in) of precipitation over 10 days, with an average humidity of 64%.

September Temperature in Alexandria

In September in Alexandria, the average temperature is 23°C (74°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop as low as 7°C (45°F). This range makes it essential for travelers to pack both light clothing for the warm days and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Alexandria, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alexandria, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (97°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec414653597076797773634945
Data source: Temperature data for Alexandria 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 Alexandria

In Alexandria in September, the total precipitation amount is 136 mm (5.4 in) over a span of 10 days.

September Precipitation Trends in Alexandria

The chart displays monthly precipitation patterns in Alexandria, 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 Alexandria, September typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec11320018015913715714114213613884155
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alexandria

In Alexandria in September, humidity is 64%. With an average temperature of 23°C (74°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration enjoyable yet slightly sticky, so it's best to stay hydrated and take breaks in the shade while traveling.

September Average Humidity in Alexandria

This chart illustrates the average monthly humidity levels in Alexandria, 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 Alexandria is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alexandria

In Alexandria in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Alexandria.

Maximum UV Index Levels in Alexandria for September

The chart shows the monthly maximum UV Index (UVI) for Alexandria 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 Alexandria typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Alexandria 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 Alexandria Compares to Other Months

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

This table compares monthly weather conditions in Alexandria, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)113 mm (4.5 inches)87%moderate
February Weather8°C (46°F)200 mm (7.9 inches)87%high
March Weather12°C (53°F)180 mm (7.1 inches)85%high
April Weather15°C (59°F)159 mm (6.3 inches)82%very high
May Weather21°C (70°F)137 mm (5.4 inches)83%very high
June Weather24°C (76°F)157 mm (6.2 inches)82%extreme
July Weather26°C (79°F)141 mm (5.6 inches)78%extreme
August Weather25°C (78°F)142 mm (5.6 inches)67%very high
September Weather23°C (74°F)136 mm (5.4 inches)64%very high
October Weather17°C (63°F)138 mm (5.4 inches)74%high
November Weather9°C (49°F)84 mm (3.3 inches)87%moderate
December Weather7°C (46°F)155 mm (6.1 inches)88%moderate

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