September Weather in Madison, United States

Last updated: June 24, 2025

In Madison, United States, the average temperature in September hovers around 25°C (77°F), creating a pleasant atmosphere for visitors. However, temperatures can vary, with a minimum of 11°C (53°F) and soaring to a maximum of 36°C (98°F). During this month, you can expect about 109 mm (4.3 in) of precipitation over 8 days, contributing to an average humidity of 82%.

September Temperature in Madison

In September in Madison, the average temperature is 25°C (77°F). Maximums can reach 36°C (98°F), while minimums can dip as low as 11°C (53°F). This makes it an ideal time for travelers to enjoy a range of outdoor activities, from soaking up the sun to exploring the pleasant cooler evenings.

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 (77°F), with highs reaching up to 36°C (98°F) and lows dropping to around 11°C (53°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 total precipitation amount is 109 mm (4.3 in) spread over 8 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 109 mm (4.3 inches) of precipitation spread over approximately 8 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 82%. With an average temperature of 25°C (77°F), this humidity feels like a warm, oppressive blanket enveloping you as you explore, making every step feel more laborious and prompting the need for frequent hydration breaks.

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 82%, 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	9°C (48°F)	103 mm (4.0 inches)	86%	moderate
February Weather	12°C (53°F)	125 mm (4.9 inches)	84%	high
March Weather	14°C (58°F)	96 mm (3.8 inches)	83%	very high
April Weather	18°C (64°F)	104 mm (4.1 inches)	81%	very high
May Weather	23°C (73°F)	99 mm (3.9 inches)	81%	extreme
June Weather	25°C (78°F)	109 mm (4.3 inches)	81%	extreme
July Weather	27°C (81°F)	108 mm (4.2 inches)	83%	extreme
August Weather	27°C (80°F)	108 mm (4.3 inches)	81%	very high
September Weather	25°C (77°F)	109 mm (4.3 inches)	82%	very high
October Weather	20°C (68°F)	107 mm (4.2 inches)	78%	very high
November Weather	12°C (54°F)	80 mm (3.2 inches)	86%	high
December Weather	10°C (50°F)	133 mm (5.3 inches)	89%	moderate