September Weather in Holly Hill, United States

Last updated: June 24, 2025

In September, the average temperature in Holly Hill, United States is a warm 25°C (78°F). Expect a range between a cool 11°C (53°F) and a sizzling 36°C (98°F). During this month, 117 mm (4.6 in) of precipitation typically falls over 10 days, resulting in an average humidity of 83%. Stay prepared for both warmth and occasional rain!

September Temperature in Holly Hill

In September in Holly Hill, the average temperature is 25°C (78°F), with maximums reaching up to 36°C (98°F) and minimums dropping as low as 11°C (53°F). This variety in temperatures makes it essential for travelers to pack both light clothing for the daytime warmth and warmer layers for the cooler evenings.

September Weather in Holly Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Holly Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Holly Hill, September typically has an average temperature of 25°C (78°F), with highs reaching up to 36°C (98°F) and lows dropping to around 11°C (53°F).

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

September Precipitation in Holly Hill

In Holly Hill in September, the total precipitation amount is 117 mm (4.6 in) recorded over a span of 10 days.

September Precipitation Trends in Holly Hill

The chart displays monthly precipitation patterns in Holly Hill, 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 Holly Hill, September typically receives around 117 mm (4.6 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 Holly Hill

In Holly Hill in September, humidity is 83%. With an average temperature of 25°C (78°F), this humidity feels like stepping into a warm, damp embrace, making travel sticky and exhausting, as each movement can leave you drenched in sweat.

September Average Humidity in Holly Hill

This chart illustrates the average monthly humidity levels in Holly Hill, 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 Holly Hill is approximately 83%, 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 Holly Hill

In Holly Hill 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 Holly Hill.

Maximum UV Index Levels in Holly Hill for September

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

Data source: Holly Hill 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 Holly Hill Compares to Other Months

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

This table compares monthly weather conditions in Holly Hill, 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 (50°F)	73 mm (2.9 inches)	86%	moderate
February Weather	13°C (56°F)	98 mm (3.9 inches)	81%	high
March Weather	15°C (59°F)	75 mm (3.0 inches)	81%	very high
April Weather	19°C (66°F)	109 mm (4.3 inches)	79%	very high
May Weather	23°C (74°F)	96 mm (3.8 inches)	75%	extreme
June Weather	26°C (79°F)	122 mm (4.8 inches)	75%	extreme
July Weather	27°C (82°F)	166 mm (6.6 inches)	80%	extreme
August Weather	27°C (81°F)	144 mm (5.7 inches)	81%	extreme
September Weather	25°C (78°F)	117 mm (4.6 inches)	83%	very high
October Weather	21°C (70°F)	64 mm (2.5 inches)	78%	very high
November Weather	14°C (57°F)	66 mm (2.6 inches)	85%	high
December Weather	11°C (53°F)	135 mm (5.3 inches)	87%	moderate