September Weather in Madison, United States

Last updated: June 24, 2025

In Madison, United States, the average temperature in September hovers around 26°C (78°F), making it a pleasant time to visit. However, temperatures can vary widely, with a minimum of 11°C (53°F) and a maximum of 38°C (100°F). Be prepared for some rain, as the area experiences an average precipitation of 94 mm (3.7 in) over 7 days. With an average humidity of 73%, the air feels quite tropical, so pack accordingly!

September Temperature in Madison

In September in Madison, the average temperature is 26°C (78°F). The maximum can reach 38°C (100°F), and the minimum can be as low as 11°C (53°F). It's an ideal time for travelers to enjoy pleasant weather and a variety of outdoor activities.

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 26°C (78°F), with highs reaching up to 38°C (100°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 precipitation amount is 94 mm (3.7 in) over a span of 7 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 94 mm (3.7 inches) of precipitation spread over approximately 7 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 73%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making traveling a bit sticky but also inviting, as the air wraps around you, intensifying the heat and creating a tropical atmosphere.

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 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 Madison

In Madison 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 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 10, 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)	113 mm (4.4 inches)	84%	moderate
February Weather	11°C (53°F)	164 mm (6.5 inches)	83%	high
March Weather	16°C (60°F)	128 mm (5.0 inches)	80%	very high
April Weather	18°C (64°F)	164 mm (6.5 inches)	82%	extreme
May Weather	23°C (74°F)	122 mm (4.8 inches)	83%	extreme
June Weather	26°C (79°F)	141 mm (5.5 inches)	80%	extreme
July Weather	28°C (82°F)	100 mm (3.9 inches)	80%	extreme
August Weather	27°C (81°F)	129 mm (5.1 inches)	75%	extreme
September Weather	26°C (78°F)	94 mm (3.7 inches)	73%	very high
October Weather	20°C (69°F)	113 mm (4.4 inches)	76%	very high
November Weather	12°C (55°F)	72 mm (2.8 inches)	84%	high
December Weather	11°C (52°F)	122 mm (4.8 inches)	88%	moderate