September Weather in West Decatur, United States

Last updated: June 24, 2025

In September, the average temperature in West Decatur, United States hovers around 18°C (64°F), with a minimum dipping to 1°C (34°F) and a maximum soaring to 31°C (89°F). Expect 122 mm (4.8 in) of precipitation over approximately 11 days, accompanied by an average humidity level of 67%. Come prepared for a mix of weather!

September Temperature in West Decatur

In September in West Decatur, the average temperature is 18°C (64°F). Maximum temperatures can reach 31°C (89°F), while minimums can dip as low as 1°C (34°F). This variation in weather makes it essential to pack layered clothing for your travels.

September Weather in West Decatur: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in West Decatur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In West Decatur, September typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (89°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in West Decatur

In West Decatur in September, the total precipitation amount is 122 mm (4.8 in) over a span of 11 days.

September Precipitation Trends in West Decatur

The chart displays monthly precipitation patterns in West Decatur, 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 West Decatur, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 11 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 West Decatur

In West Decatur in September humidity is 67%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel quite comfortable but slightly sticky, encouraging lightweight clothing and the occasional refreshing break in the shade.

September Average Humidity in West Decatur

This chart illustrates the average monthly humidity levels in West Decatur, 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 West Decatur 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 West Decatur

In West Decatur 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 West Decatur.

Maximum UV Index Levels in West Decatur for September

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

Data source: West Decatur 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 West Decatur Compares to Other Months

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

This table compares monthly weather conditions in West Decatur, 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 (27°F)	79 mm (3.1 inches)	89%	moderate
February Weather	-1°C (31°F)	109 mm (4.3 inches)	90%	moderate
March Weather	3°C (38°F)	92 mm (3.6 inches)	89%	high
April Weather	9°C (48°F)	119 mm (4.7 inches)	88%	very high
May Weather	15°C (59°F)	145 mm (5.7 inches)	80%	very high
June Weather	19°C (67°F)	115 mm (4.5 inches)	79%	very high
July Weather	22°C (72°F)	121 mm (4.8 inches)	74%	very high
August Weather	21°C (71°F)	107 mm (4.2 inches)	64%	very high
September Weather	18°C (64°F)	122 mm (4.8 inches)	67%	very high
October Weather	12°C (54°F)	117 mm (4.6 inches)	81%	high
November Weather	4°C (39°F)	87 mm (3.4 inches)	89%	moderate
December Weather	0°C (33°F)	95 mm (3.8 inches)	88%	low