Madison
Wisconsin, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Madison, WI

A view of the State Capitol building in Madison, Wisconsin, on a beautiful spring evening
A view of the State Capitol building in Madison, Wisconsin, on a beautiful spring evening
September, the first month of the autumn, in Madison, is still a pleasant month, with temperature in the range of an average low of 50.2°F (10.1°C) and an average high of 71.8°F (22.1°C).

Temperature

In September, the average high-temperature slightly decreases, from a warm 79.3°F (26.3°C) in August, to a pleasant 71.8°F (22.1°C). In September, the average low-temperature is 50.2°F (10.1°C).

Humidity

In September, the average relative humidity in Madison is 76.8%.

Rainfall

In September, the rain falls for 9.3 days. Throughout September, 3.1" (79.5mm) of precipitation is accumulated. In Madison, during the entire year, the rain falls for 124.8 days and collects up to 34.5" (875.9mm) of precipitation.

Snowfall

In Madison, in September, it doesn't snow. In October, it regularly snows. In Madison, during the entire year, snow aggregates up to 50.9" (1292.8mm).

Daylight

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

Sunshine

In September, the average sunshine is 7.1h.

UV index

The average daily maximum UV index in Madison is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.

What is the temperature in September in Madison?

The average high-temperature, in September, is 71.8°F (22.1°C), while the average low-temperature is 50.2°F (10.1°C).

What is the average humidity in September in Madison?

In Madison, Wisconsin, the average relative humidity in September is 76.8%.

How many days does it rain in September in Madison?

In Madison, Wisconsin, during September, the rain falls for 9.3 days and regularly aggregates up to 3.1" (79.5mm) of precipitation.

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

How long on average sun shines in September in Madison?

In Madison, Wisconsin, the average sunshine in September is 7.1h.

What is the UV index reading in September in Madison?

In September, the average daily maximum UV index in Madison is 6. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Madison, WI
  • Average high temperature in September: 22.1°C

The warmest month (with the highest average high temperature) is July (27.6°C).
The month with the lowest average high temperature is January (-3.1°C).

  • Average low temperature in September: 10.1°C

The month with the highest average low temperature is July (16.1°C).
The coldest month (with the lowest average low temperature) is January (-11.6°C).

Average humidity in September - Madison, WI
  • Average humidity in September: 76.8%

The month with the highest relative humidity is December (78.5%).
The month with the lowest relative humidity is May (65.8%).

Average rainfall in September - Madison, WI
  • Average rainfall in September: 79.5mm

The wettest month (with the highest rainfall) is June (115.3mm).
The driest month (with the lowest rainfall) is January (31.2mm).

Average rainfall days in September - Madison, WI
  • Average rainfall days in September: 9.3 days

The month with the highest number of rainy days is April (12.1 days).
The month with the lowest number of rainy days is February (9.2 days).

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

The month with the highest snowfall is December (342.9mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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 (9.8 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

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 shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 7.1h

Months with most sunshine are June and July (Average sunshine: 9.8h).
The month with least sunshine is December (Average sunshine: 3.5h).

Average UV index in September - Madison, WI
  • Average UV index in September: 6

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).