September Weather in Louisa, United States

Last updated: June 24, 2025

In September, the average temperature in Louisa, United States is a pleasant 22°C (71°F), making it an ideal time to explore the area. However, temperatures can vary widely, with minimums dipping to 8°C (47°F) and maximums soaring to 36°C (97°F). Be prepared for some rain, as precipitation averages 103 mm (4.1 in) over 8 days during the month. Additionally, you can expect a comfortable average humidity of 67%, adding to the unique charm of your visit!

September Temperature in Louisa

In September in Louisa, the average temperature is 22°C (71°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 8°C (47°F). This makes it a great time for travelers to enjoy pleasant weather and a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Louisa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Louisa, September typically has an average temperature of 22°C (71°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Louisa

In Louisa in September, the precipitation amount is 103 mm (4.1 in) over a span of 8 days.

September Precipitation Trends in Louisa

The chart displays monthly precipitation patterns in Louisa, 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 Louisa, September typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 8 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 Louisa

In Louisa in September, humidity is 67%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet slightly uncomfortable, as the air hangs thick, reminding travelers to stay hydrated and seek shade during the midday sun.

September Average Humidity in Louisa

This chart illustrates the average monthly humidity levels in Louisa, 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 Louisa is approximately 67%, 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 Louisa

In Louisa 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 Louisa.

Maximum UV Index Levels in Louisa for September

The chart shows the monthly maximum UV Index (UVI) for Louisa 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 Louisa typically reaches 9, which falls under the very high exposure category.

Data source: Louisa 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 Louisa Compares to Other Months

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

This table compares monthly weather conditions in Louisa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (37°F)	100 mm (3.9 inches)	88%	moderate
February Weather	6°C (42°F)	152 mm (6.0 inches)	88%	moderate
March Weather	9°C (49°F)	118 mm (4.7 inches)	87%	high
April Weather	14°C (57°F)	127 mm (5.0 inches)	84%	very high
May Weather	19°C (67°F)	132 mm (5.2 inches)	84%	very high
June Weather	23°C (73°F)	160 mm (6.3 inches)	83%	very high
July Weather	25°C (78°F)	117 mm (4.6 inches)	79%	very high
August Weather	24°C (75°F)	120 mm (4.7 inches)	66%	very high
September Weather	22°C (71°F)	103 mm (4.1 inches)	67%	very high
October Weather	16°C (61°F)	116 mm (4.6 inches)	76%	high
November Weather	8°C (46°F)	74 mm (2.9 inches)	89%	moderate
December Weather	5°C (42°F)	123 mm (4.8 inches)	88%	moderate