September Weather in Atlantic, United States

Last updated: June 24, 2025

In September, the average temperature in Atlantic, United States hovers around 25°C (78°F), with comfortable lows of 18°C (65°F) and highs reaching up to 30°C (86°F). Expect about 164 mm (6.4 in) of precipitation over 12 days, and prepare for a humid atmosphere with an average humidity of around 80%.

September Temperature in Atlantic

In September in Atlantic, the average temperature is 25°C (78°F). Maximum temperatures can reach 30°C (86°F), while the minimum can drop as low as 18°C (65°F). This mild and pleasant weather makes Atlantic an ideal destination for travelers seeking enjoyable outdoor activities.

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

The chart illustrates September temperature patterns in Atlantic, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atlantic, September typically has an average temperature of 25°C (78°F), with highs reaching up to 30°C (86°F) and lows dropping to around 18°C (65°F).

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

September Precipitation in Atlantic

In Atlantic in September, the precipitation amount is 164 mm (6.4 in) distributed over 12 days.

September Precipitation Trends in Atlantic

The chart displays monthly precipitation patterns in Atlantic, 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 Atlantic, September typically receives around 164 mm (6.4 inches) of precipitation spread over approximately 12 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 Atlantic

In Atlantic in September, humidity is 80%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making every outdoor activity feel more strenuous and steaming, while also causing you to seek out shade and refreshment more frequently.

September Average Humidity in Atlantic

This chart illustrates the average monthly humidity levels in Atlantic, 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 Atlantic is approximately 80%, 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 Atlantic

In Atlantic 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 Atlantic.

Maximum UV Index Levels in Atlantic for September

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

Data source: Atlantic 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 Atlantic Compares to Other Months

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

This table compares monthly weather conditions in Atlantic, 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)	91 mm (3.6 inches)	84%	moderate
February Weather	12°C (53°F)	148 mm (5.8 inches)	81%	high
March Weather	13°C (56°F)	89 mm (3.5 inches)	80%	very high
April Weather	17°C (63°F)	98 mm (3.9 inches)	80%	very high
May Weather	21°C (71°F)	106 mm (4.2 inches)	81%	extreme
June Weather	25°C (77°F)	145 mm (5.7 inches)	82%	extreme
July Weather	27°C (81°F)	159 mm (6.3 inches)	83%	extreme
August Weather	27°C (80°F)	188 mm (7.4 inches)	82%	very high
September Weather	25°C (78°F)	164 mm (6.4 inches)	80%	very high
October Weather	22°C (71°F)	91 mm (3.6 inches)	79%	very high
November Weather	16°C (61°F)	122 mm (4.8 inches)	83%	moderate
December Weather	13°C (55°F)	154 mm (6.1 inches)	84%	moderate