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September Weather in Madison, United States

Last updated: June 24, 2025

The average temperature in Madison, United States during September hovers around 20°C (69°F). Expect a minimum of 10°C (50°F) and a comfortable maximum of 29°C (84°F). While enjoying the pleasant weather, be prepared for precipitation totaling 98 mm (3.9 in) over approximately 9 days, and remember that the average humidity is around 68%.

September Temperature in Madison

In September, in Madison, the average temperature is 20°C (69°F). Maximums can reach 29°C (84°F), while minimums can drop as low as 10°C (50°F). This mild climate makes it an ideal time for outdoor activities and exploration.

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 20°C (69°F), with highs reaching up to 29°C (84°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec343539475666737468604839
Data source: Temperature data for Madison generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Madison

In Madison in September, the precipitation amount is 98 mm (3.9 in) spread over a duration of 9 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 98 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec83113105141119821289498151106151
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Madison

In Madison in September, humidity is 68%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making outdoor exploration both refreshing and slightly sticky, requiring occasional breaks in the shade to stay comfortable while traveling.

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 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
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.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)83 mm (3.3 inches)84%moderate
February Weather2°C (35°F)113 mm (4.4 inches)82%moderate
March Weather4°C (39°F)105 mm (4.1 inches)81%high
April Weather8°C (47°F)141 mm (5.5 inches)78%very high
May Weather13°C (56°F)119 mm (4.7 inches)69%very high
June Weather19°C (66°F)82 mm (3.2 inches)69%very high
July Weather23°C (74°F)128 mm (5.1 inches)62%very high
August Weather23°C (74°F)94 mm (3.7 inches)65%very high
September Weather20°C (69°F)98 mm (3.9 inches)68%very high
October Weather16°C (60°F)151 mm (5.9 inches)74%high
November Weather9°C (48°F)106 mm (4.2 inches)82%moderate
December Weather4°C (39°F)151 mm (6.0 inches)80%low

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