September Weather in Alma, United States

Last updated: June 24, 2025

In September, the average temperature in Alma, United States is a pleasant 21°C (70°F). Visitors can expect a range, with minimums dipping to 4°C (39°F) and highs soaring up to 37°C (98°F). During this time, 59 mm (2.3 in) of precipitation falls over about 5 days, accompanied by an average humidity level of 73%. Prepare for a dynamic climate that caters to both warm sun and refreshing showers!

September Temperature in Alma

In September in Alma, the average temperature is 21°C (70°F). Maximum temperatures can reach 37°C (98°F), while the minimum can drop as low as 4°C (39°F). This varied climate makes Alma an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Alma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alma, September typically has an average temperature of 21°C (70°F), with highs reaching up to 37°C (98°F) and lows dropping to around 4°C (39°F).

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

September Precipitation in Alma

In Alma in September, the precipitation amount is 59 mm (2.3 in) over the course of 5 days.

September Precipitation Trends in Alma

The chart displays monthly precipitation patterns in Alma, 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 Alma, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 5 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 Alma

In Alma in September, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

September Average Humidity in Alma

This chart illustrates the average monthly humidity levels in Alma, 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 Alma is approximately 73%, 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 Alma

In Alma 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 Alma.

Maximum UV Index Levels in Alma for September

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

Data source: Alma 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 Alma Compares to Other Months

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

This table compares monthly weather conditions in Alma, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	24 mm (0.9 inches)	74%	moderate
February Weather	-2°C (28°F)	20 mm (0.8 inches)	78%	moderate
March Weather	6°C (43°F)	75 mm (2.9 inches)	67%	high
April Weather	11°C (51°F)	37 mm (1.5 inches)	70%	very high
May Weather	17°C (62°F)	165 mm (6.5 inches)	82%	very high
June Weather	24°C (76°F)	59 mm (2.3 inches)	81%	extreme
July Weather	26°C (79°F)	66 mm (2.6 inches)	80%	extreme
August Weather	24°C (76°F)	87 mm (3.4 inches)	80%	very high
September Weather	21°C (70°F)	59 mm (2.3 inches)	73%	very high
October Weather	12°C (53°F)	64 mm (2.5 inches)	71%	high
November Weather	5°C (42°F)	18 mm (0.7 inches)	79%	moderate
December Weather	1°C (33°F)	35 mm (1.4 inches)	83%	moderate