September Weather in Alexandria, United States

Last updated: June 24, 2025

In September, the average temperature in Alexandria, United States hovers around 26°C (79°F), with a range from a cool 12°C (54°F) to a blistering 39°C (103°F). Expect around 130 mm (5.1 in) of precipitation over 10 days, contributing to an average humidity of 72%. Prepare for a mix of warm, humid days and the occasional downpour!

September Temperature in Alexandria

In September in Alexandria, the average temperature is 26°C (79°F). Maximums can reach 39°C (103°F), while minimums can drop to as low as 12°C (54°F). Be prepared for warm days and cooler nights when traveling during this month.

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 26°C (79°F), with highs reaching up to 39°C (103°F) and lows dropping to around 12°C (54°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 130 mm (5.1 in) over a period 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 130 mm (5.1 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Alexandria

In Alexandria in September, humidity is 72%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel a bit more strenuous but also adding a tropical charm to your travels.

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 72%, 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 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 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 10, which falls under the very 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	10°C (51°F)	112 mm (4.4 inches)	81%	moderate
February Weather	13°C (55°F)	129 mm (5.1 inches)	81%	high
March Weather	17°C (63°F)	100 mm (3.9 inches)	79%	very high
April Weather	19°C (67°F)	164 mm (6.4 inches)	80%	extreme
May Weather	24°C (75°F)	185 mm (7.3 inches)	81%	extreme
June Weather	27°C (80°F)	125 mm (4.9 inches)	76%	extreme
July Weather	28°C (82°F)	146 mm (5.8 inches)	73%	extreme
August Weather	28°C (83°F)	134 mm (5.3 inches)	71%	extreme
September Weather	26°C (79°F)	130 mm (5.1 inches)	72%	very high
October Weather	21°C (70°F)	123 mm (4.9 inches)	73%	very high
November Weather	14°C (58°F)	71 mm (2.8 inches)	83%	high
December Weather	12°C (54°F)	126 mm (5.0 inches)	88%	moderate