September Weather in Colonial Beach, United States

Last updated: June 24, 2025

In Colonial Beach, United States, the average temperature in September hovers around 23°C (74°F), with a minimum dropping to 11°C (52°F) and a maximum soaring to 36°C (97°F). Expect 92 mm (3.6 in) of precipitation spread over 10 days, contributing to an average humidity of 75%. Enjoy a delightful mix of warmth and occasional rain!

September Temperature in Colonial Beach

In September in Colonial Beach, the average temperature is 23°C (74°F). Maximums can reach 36°C (97°F) and minimums can be as low as 11°C (52°F). This makes it a great time for travelers seeking pleasant weather and a mix of warm and cooler days.

September Weather in Colonial Beach: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Colonial Beach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Colonial Beach, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (97°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Colonial Beach

In Colonial Beach in September, the total precipitation amount is 92 mm (3.6 in), which falls over the course of 10 days.

September Precipitation Trends in Colonial Beach

The chart displays monthly precipitation patterns in Colonial Beach, 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 Colonial Beach, September typically receives around 92 mm (3.6 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 Colonial Beach

In Colonial Beach in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Colonial Beach

This chart illustrates the average monthly humidity levels in Colonial Beach, 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 Colonial Beach is approximately 75%, 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 Colonial Beach

In Colonial Beach in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Colonial Beach.

Maximum UV Index Levels in Colonial Beach for September

The chart shows the monthly maximum UV Index (UVI) for Colonial Beach 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 Colonial Beach typically reaches 8, which falls under the very high exposure category.

Data source: Colonial Beach 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 Colonial Beach Compares to Other Months

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

This table compares monthly weather conditions in Colonial Beach, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	62 mm (2.4 inches)	84%	moderate
February Weather	6°C (43°F)	93 mm (3.6 inches)	83%	moderate
March Weather	9°C (49°F)	75 mm (2.9 inches)	83%	high
April Weather	15°C (59°F)	99 mm (3.9 inches)	81%	very high
May Weather	20°C (68°F)	115 mm (4.5 inches)	78%	very high
June Weather	24°C (76°F)	110 mm (4.3 inches)	79%	very high
July Weather	27°C (81°F)	118 mm (4.6 inches)	74%	very high
August Weather	26°C (79°F)	157 mm (6.2 inches)	72%	very high
September Weather	23°C (74°F)	92 mm (3.6 inches)	75%	very high
October Weather	18°C (64°F)	110 mm (4.3 inches)	81%	high
November Weather	10°C (50°F)	80 mm (3.1 inches)	85%	moderate
December Weather	6°C (43°F)	88 mm (3.5 inches)	84%	moderate