September weather forecast
Madison, WI

The State Capitol building in Madison, Wisconsin, on a beautiful spring evening
The State Capitol building in Madison, Wisconsin, on a beautiful spring evening

Weather in September

The first month of the autumn, September, is still a pleasant month in Madison, Wisconsin, with an average temperature fluctuating between 71.1°F (21.7°C) and 52°F (11.1°C).

Temperature

In Madison, the average high-temperature in September marginally drops from a moderately hot 77.4°F (25.2°C) in August to an agreeable 71.1°F (21.7°C). In September, in Madison, the average low-temperature is 52°F (11.1°C).

Humidity

In Madison, the average relative humidity in September is 81%.

Rainfall

In September, the rain falls for 3.5 days. Throughout September, 0.43" (11mm) of precipitation is accumulated. Throughout the year, there are 50.2 rainfall days, and 4.76" (121mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Madison.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:22 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:41 pm CDT.

Sunshine

In Madison, the average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in September in Madison is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Madison?

In Madison, in September, the average high-temperature is 71.1°F (21.7°C), and the average low-temperature is 52°F (11.1°C).

What is the average humidity in September in Madison?

In September, the average relative humidity in Madison, Wisconsin, is 81%.

How many days does it rain in September in Madison?

In Madison, during September, the rain falls for 3.5 days and regularly aggregates up to 0.43" (11mm) of precipitation.

When it does not snow in Madison?

May through September are months without snowfall.

Does it snow in Madison in September?

In Madison, Wisconsin, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Madison?

In Madison, Wisconsin, the average day length in September is 12h and 29min.

When is the sunrise / sunset in September in Madison?

On the first day of September, sunrise is at 6:22 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:41 pm CDT.

How many hours of sunshine does Madison have in September?

In September, the average sunshine duration in Madison, Wisconsin, is 8.6h.

What is the UV index intensity in September in Madison?

In September, the average daily maximum UV index in Madison is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Madison, WI

Average temperature in September - Madison, WI
  • Average high temperature in September: 71.1°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (23.9°F).

  • Average low temperature in September: 52°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

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Average pressure in September
Madison, WI

Average pressure in September - Madison, WI
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in September
Madison, WI

Average wind speed in September - Madison, WI
  • Average wind speed in September: 7.5mph

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in September
Madison, WI

Average humidity in September - Madison, WI
  • Average humidity in September: 81%

The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and October (77%).

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Average rainfall in September
Madison, WI

Average rainfall in September - Madison, WI
  • Average rainfall in September: 0.43"

The wettest month (with the highest rainfall) is July (0.63").
The driest months (with the least rainfall) are January, March, November and December (0.24").

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Average rainfall days in September
Madison, WI

Average rainfall days in September - Madison, WI
  • Average rainfall days in September: 3.5 days

The month with the highest number of rainy days is June (6.7 days).
The month with the least rainy days is January (1.1 days).

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Average snowfall in September
Madison, WI

Average snowfall in September - Madison, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.94").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Madison, WI

Average snowfall days in September - Madison, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Madison, WI

Average daylight in September / Average sunshine in September - Madison, WI
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 19min).
The month with the shortest days is December (Average daylight: 9h and 4min).

  • Average sunshine in September: 8h and 36min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in September
Madison, WI

Average sunshine days in September - Madison, WI
  • Average sunshine days in September: 23.8 days

The month with the most sunshine days is December (27 days).
The month with the least sunshine days is June (19.8 days).

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Average UV index in September
Madison, WI

Average UV index in September - Madison, WI
  • Average UV index in September: 3

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in September
Madison, WI

Average cloud cover in September - Madison, WI
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in September
Madison, WI

Average visibility in September - Madison, WI
  • Average visibility in September: 5mi

The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).

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