September Weather in Largo, United States

Last updated: June 24, 2025

In September, the average temperature in Largo, United States hovers around 27°C (82°F). Expect lows of 23°C (74°F) and highs reaching 32°C (89°F). This month brings about 135 mm (5.3 in) of precipitation spread across 18 days, contributing to an average humidity of 78%. Whether you're planning outdoor activities or cozy indoor retreats, the weather this month promises to be quite eventful!

September Temperature in Largo

In September in Largo, the average temperature is 27°C (82°F). Maximums can reach 32°C (89°F) and minimums can be as low as 23°C (74°F). This pleasant climate makes it an ideal time for travelers to enjoy outdoor activities and explore the local attractions.

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

The chart illustrates September temperature patterns in Largo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Largo, September typically has an average temperature of 27°C (82°F), with highs reaching up to 32°C (89°F) and lows dropping to around 23°C (74°F).

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

September Precipitation in Largo

In Largo in September, the total precipitation amount is 135 mm (5.3 in) spread over 18 days.

September Precipitation Trends in Largo

The chart displays monthly precipitation patterns in Largo, 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 Largo, September typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 18 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 Largo

In Largo in September humidity is 78%. With an average temperature of 27°C (82°F), this humidity feels like a warm blanket enveloping you, making outdoor activities a sweaty affair and requiring frequent breaks for hydration.

September Average Humidity in Largo

This chart illustrates the average monthly humidity levels in Largo, 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 Largo is approximately 78%, 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 Largo

In Largo in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Largo.

Maximum UV Index Levels in Largo for September

The chart shows the monthly maximum UV Index (UVI) for Largo 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 Largo typically reaches 11, which falls under the extreme exposure category.

Data source: Largo 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 Largo Compares to Other Months

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

This table compares monthly weather conditions in Largo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	43 mm (1.7 inches)	82%	high
February Weather	18°C (65°F)	57 mm (2.2 inches)	82%	very high
March Weather	20°C (68°F)	20 mm (0.8 inches)	79%	very high
April Weather	22°C (73°F)	66 mm (2.6 inches)	78%	extreme
May Weather	25°C (77°F)	103 mm (4.0 inches)	76%	extreme
June Weather	27°C (81°F)	159 mm (6.3 inches)	75%	extreme
July Weather	28°C (82°F)	210 mm (8.3 inches)	74%	extreme
August Weather	28°C (83°F)	221 mm (8.7 inches)	74%	extreme
September Weather	27°C (82°F)	135 mm (5.3 inches)	78%	extreme
October Weather	26°C (78°F)	71 mm (2.8 inches)	79%	very high
November Weather	21°C (70°F)	46 mm (1.8 inches)	82%	high
December Weather	18°C (65°F)	70 mm (2.8 inches)	84%	moderate