September Weather in Madison, United States

Last updated: June 24, 2025

In Madison, United States, the average temperature in September hovers around 25°C (76°F). Expect minimums to dip as low as 5°C (41°F) and soar to a sizzling maximum of 46°C (116°F). With only 1 mm (0.0 in) of precipitation over 0 days, you can enjoy relatively dry conditions. The average humidity stands at a comfortable 44%, making it a pleasant time to explore!

September Temperature in Madison

In September, in Madison, the average temperature is 25°C (76°F). Maximum can reach 46°C (116°F) and minimum can be as low as 5°C (41°F). Travelers should be prepared for a wide range of temperatures and adjust their plans accordingly.

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

The chart illustrates September temperature patterns in Madison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Madison, September typically has an average temperature of 25°C (76°F), with highs reaching up to 46°C (116°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Madison

In Madison in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

September Precipitation Trends in Madison

The chart displays monthly precipitation patterns in Madison, 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 Madison, September typically receives around 1 mm (0.0 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 Madison

In Madison in September humidity is 44%. With an average temperature of 25°C (76°F), this humidity feels like a warm embrace, making it comfortable for exploring outdoor attractions while maintaining a pleasant breeze that keeps travel enjoyable.

September Average Humidity in Madison

This chart illustrates the average monthly humidity levels in Madison, 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 Madison is approximately 44%, 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 Madison

In Madison 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 Madison.

Maximum UV Index Levels in Madison for September

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

Data source: Madison 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 Madison Compares to Other Months

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

This table compares monthly weather conditions in Madison, 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)	111 mm (4.4 inches)	84%	moderate
February Weather	12°C (54°F)	98 mm (3.9 inches)	84%	moderate
March Weather	13°C (56°F)	73 mm (2.9 inches)	83%	high
April Weather	17°C (64°F)	27 mm (1.1 inches)	81%	very high
May Weather	21°C (71°F)	19 mm (0.8 inches)	74%	extreme
June Weather	26°C (79°F)	3 mm (0.1 inches)	64%	extreme
July Weather	28°C (82°F)	1 mm (0.0 inches)	44%	extreme
August Weather	27°C (81°F)	0 mm (0.0 inches)	36%	very high
September Weather	25°C (76°F)	1 mm (0.0 inches)	44%	very high
October Weather	20°C (67°F)	26 mm (1.0 inches)	65%	high
November Weather	14°C (57°F)	35 mm (1.4 inches)	84%	moderate
December Weather	10°C (50°F)	74 mm (2.9 inches)	83%	moderate