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September Weather in Madison, United States

Last updated: June 24, 2025

In Madison, United States, the average temperature in September hovers around 22°C (72°F), with a comfortable humidity level of 71%. Expect minimums as low as 5°C (42°F) and maximums reaching 34°C (94°F). However, be prepared for some rain, as 92 mm (3.6 in) of precipitation can fall over the course of about 7 days.

September Temperature in Madison

In September, in Madison, the average temperature is 22°C (72°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 5°C (42°F). This wide temperature range makes Madison an ideal destination for travelers seeking both warm and cooler experiences throughout the month.

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 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec333448556677797772574538
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 92 mm (3.6 in) over the course 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 92 mm (3.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec4534849118910799125931323331
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 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

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.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109643
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 Weather0°C (33°F)45 mm (1.8 inches)76%moderate
February Weather1°C (34°F)34 mm (1.4 inches)77%high
March Weather9°C (48°F)84 mm (3.3 inches)70%high
April Weather13°C (55°F)91 mm (3.6 inches)73%very high
May Weather19°C (66°F)189 mm (7.4 inches)82%very high
June Weather25°C (77°F)107 mm (4.2 inches)82%extreme
July Weather26°C (80°F)99 mm (3.9 inches)81%extreme
August Weather25°C (77°F)125 mm (4.9 inches)78%very high
September Weather22°C (72°F)92 mm (3.6 inches)71%very high
October Weather14°C (57°F)132 mm (5.2 inches)71%high
November Weather7°C (45°F)33 mm (1.3 inches)81%moderate
December Weather4°C (39°F)31 mm (1.2 inches)84%moderate

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