September weather forecast and climate
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

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

Temperature

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

Humidity

In September, the average relative humidity is 81%.

Rainfall

In Madison, it is raining for 3.5 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 50.2 rainfall days, and 4.76" (121mm) of precipitation is accumulated.

Snowfall

In Madison snow does not fall in May through September.

Daylight

The average length of the day in Madison is 12.5h.

Sunshine

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

UV index

The average daily maximum UV index in Madison is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 3 transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Madison?

The average high-temperature, in September, in Madison, is 71.1°F (21.7°C), while 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 is 81%.

How much does it rain in Madison in September?

In Madison, in September, during 3.5 rainfall days, 0.43" (11mm) of precipitation is typically accumulated.

Does it snow in Madison in September?

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

When it does not snow in Madison?

In Madison snow does not fall in May through September.

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

In September, the average length of the day in Madison is 12.5h.

How long on average sun shines in September in Madison?

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

How high is the UV index in September in Madison?

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.

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"

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

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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%

Months with the highest relative humidity are January and February (88%).
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").
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).
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: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 9.8h).
The month with the least sunshine is January (Average sunshine: 3.3h).

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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

Months with the highest UV index are June and July (UV index 6).
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

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

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