September Weather in Alexandria, United States

Last updated: June 24, 2025

In September, the average temperature in Alexandria, United States is a comfortable 16°C (61°F), with potential extremes ranging from a chilly 0°C (32°F) to a warm 31°C (89°F). Visitors can expect 93 mm (3.7 in) of precipitation over about 10 days, contributing to an average humidity level of 82%.

September Temperature in Alexandria

In September in Alexandria, the average temperature is 16°C (61°F). Maximum temperatures can reach up to 31°C (89°F), while minimums can drop as low as 0°C (32°F). It's a month of varied weather, perfect for travelers who enjoy both warm and cool conditions.

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 16°C (61°F), with highs reaching up to 31°C (89°F) and lows dropping to around 0°C (32°F).

Data source: Temperature data for Alexandria generated using information from the Copernicus Climate Change Service.

September Precipitation in Alexandria

In Alexandria in September, the precipitation amount is 93 mm (3.7 in) over the course 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 93 mm (3.7 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Alexandria

In Alexandria in September humidity is 82%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket enveloping you, making travel feel a bit sluggish and requiring frequent breaks to hydrate and cool down.

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 82%, offering insight into how humid the weather typically is during this month.

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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 7, which falls under the high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-11°C (12°F)	19 mm (0.8 inches)	85%	low
February Weather	-11°C (12°F)	21 mm (0.8 inches)	89%	moderate
March Weather	-2°C (29°F)	36 mm (1.4 inches)	81%	moderate
April Weather	4°C (40°F)	66 mm (2.6 inches)	82%	high
May Weather	13°C (56°F)	81 mm (3.2 inches)	76%	very high
June Weather	21°C (69°F)	79 mm (3.1 inches)	81%	very high
July Weather	22°C (73°F)	109 mm (4.3 inches)	82%	very high
August Weather	20°C (69°F)	118 mm (4.6 inches)	83%	very high
September Weather	16°C (61°F)	93 mm (3.7 inches)	82%	high
October Weather	7°C (45°F)	89 mm (3.5 inches)	82%	moderate
November Weather	-1°C (30°F)	26 mm (1.0 inches)	87%	moderate
December Weather	-7°C (20°F)	43 mm (1.7 inches)	84%	low