September Weather in Madison, United States

Last updated: June 24, 2025

In September, the average temperature in Madison, United States is a mild 15°C (59°F). Expect a minimum of -3°C (27°F) and a potential maximum of 30°C (86°F). During this time, you'll encounter about 73 mm (2.9 in) of precipitation spread over 10 days, with an average humidity of 71%.

September Temperature in Madison

In September in Madison, the average temperature is 15°C (59°F). Maximums can reach 30°C (86°F), while minimums can drop as low as -3°C (27°F). Pack accordingly to enjoy a varied climate during your travels!

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 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (27°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 73 mm (2.9 in) over the course of 10 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 73 mm (2.9 inches) of precipitation spread over approximately 10 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 71%. With an average temperature of 15°C (59°F), this humidity feels like a damp embrace, making outdoor activities slightly uncomfortable and encouraging travelers to seek shade or indoor attractions to escape the muggy air.

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 71%, 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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 7, which falls under the 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	-8°C (18°F)	93 mm (3.7 inches)	86%	low
February Weather	-6°C (21°F)	97 mm (3.8 inches)	84%	moderate
March Weather	-2°C (28°F)	82 mm (3.2 inches)	82%	high
April Weather	5°C (41°F)	153 mm (6.0 inches)	80%	very high
May Weather	12°C (54°F)	97 mm (3.8 inches)	72%	very high
June Weather	17°C (63°F)	111 mm (4.4 inches)	72%	very high
July Weather	20°C (68°F)	158 mm (6.2 inches)	67%	very high
August Weather	19°C (67°F)	107 mm (4.2 inches)	66%	very high
September Weather	15°C (59°F)	73 mm (2.9 inches)	71%	high
October Weather	9°C (48°F)	155 mm (6.1 inches)	78%	moderate
November Weather	1°C (33°F)	130 mm (5.1 inches)	84%	moderate
December Weather	-5°C (23°F)	148 mm (5.8 inches)	81%	low