September Weather in Alamo, United States

Last updated: June 24, 2025

In September, the average temperature in Alamo, United States hovers around 24°C (76°F), providing a pleasant climate. However, temperatures can vary significantly, with minimums dipping to 6°C (43°F) and maximums soaring to 40°C (104°F). Precipitation is minimal, measuring just 3 mm (0.1 in) spread over 0 days, while the average humidity remains comfortably low at 43%. Enjoy the perfect weather as you explore!

September Temperature in Alamo

In September in Alamo, the average temperature is 24°C (76°F), with maximums reaching up to 40°C (104°F) and minimums dropping as low as 6°C (43°F). Travelers should be prepared for both warm days and cooler nights during this time.

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

The chart illustrates September temperature patterns in Alamo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alamo, September typically has an average temperature of 24°C (76°F), with highs reaching up to 40°C (104°F) and lows dropping to around 6°C (43°F).

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

September Precipitation in Alamo

In Alamo in September, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

September Precipitation Trends in Alamo

The chart displays monthly precipitation patterns in Alamo, 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 Alamo, September typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 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 Alamo

In Alamo in September humidity is 43%. With an average temperature of 24°C (76°F), this humidity feels like a comfortable embrace, perfect for exploring the outdoors without feeling too sticky or overheated.

September Average Humidity in Alamo

This chart illustrates the average monthly humidity levels in Alamo, 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 Alamo is approximately 43%, 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 Alamo

In Alamo in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Alamo.

Maximum UV Index Levels in Alamo for September

The chart shows the monthly maximum UV Index (UVI) for Alamo 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 Alamo typically reaches 10, which falls under the very high exposure category.

Data source: Alamo 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 Alamo Compares to Other Months

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

This table compares monthly weather conditions in Alamo, 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)	24 mm (0.9 inches)	81%	moderate
February Weather	6°C (42°F)	24 mm (0.9 inches)	84%	high
March Weather	10°C (50°F)	35 mm (1.4 inches)	76%	very high
April Weather	16°C (60°F)	10 mm (0.4 inches)	64%	very high
May Weather	20°C (68°F)	12 mm (0.5 inches)	48%	extreme
June Weather	27°C (81°F)	1 mm (0.0 inches)	40%	extreme
July Weather	30°C (86°F)	15 mm (0.6 inches)	33%	extreme
August Weather	29°C (85°F)	4 mm (0.1 inches)	29%	extreme
September Weather	24°C (76°F)	3 mm (0.1 inches)	43%	very high
October Weather	15°C (60°F)	8 mm (0.3 inches)	61%	high
November Weather	10°C (50°F)	11 mm (0.4 inches)	76%	moderate
December Weather	4°C (39°F)	19 mm (0.7 inches)	78%	moderate