August weather forecast
Madison, WI

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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 August

August weather in Madison witnesses a slight dip with high temperatures averaging at around 77.4°F (25.2°C). The city continues to bask in summer glory with the lakes becoming a focal point of leisure activities. The abundant sunshine and reduced rainfall make it a favourite among locals and tourists alike. However, it's towards the end of the month that signs of the approaching fall season start to become discernible. Summer's end is met with a culmination of popular outdoor events, ensuring the season ends on a high note.

Temperature

Madison experiences a minor change to a still moderately hot 77.4°F (25.2°C) in average high-temperature during August, closely reflecting July. Madison experiences a mean low-temperature of 59.5°F (15.3°C) during August.

Humidity

In August, the average relative humidity is 82%.

Rainfall

In Madison, Wisconsin, in August, during 5.4 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. 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

In August, the average length of the day is 13h and 53min.
On the first day of the month, sunrise is at 5:49 am and sunset at 8:18 pm. On the last day of August, in Madison, Wisconsin, sunrise is at 6:21 am and sunset at 7:33 pm CDT.

Sunshine

The average sunshine in August in Madison is 9.7h.

UV index

The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In August, the maximum UV index of 5 suggests this advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Updated: Feb 14, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What are August temperatures in Madison?

August temperatures vary between a high-temperature of 77.4°F (25.2°C) and a low-temperature of 59.5°F (15.3°C).

What is the average humidity in August in Madison?

In August, the average relative humidity in Madison is 82%.

How much does it rain in Madison in August?

In Madison, in August, during 5.4 rainfall days, 0.31" (8mm) of precipitation is typically accumulated.

When it does not snow in Madison?

May through September are months without snowfall in Madison.

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

In Madison, the average day length in August is 13h and 53min.

When is the sunrise / sunset in August in Madison?

On the first day of August in Madison, Wisconsin, sunrise is at 5:49 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:33 pm CDT.

How many hours of sunshine does Madison have in August?

In August, the average sunshine duration in Madison, Wisconsin, is 9.7h.

What is the UV index reading in August in Madison?

The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Madison, WI

Average temperature in August - Madison, WI
  • Average high temperature in August: 77.4°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 August: 59.5°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).

Average pressure in August
Madison, WI

Average pressure in August - Madison, WI
  • Average pressure in August: 29.97"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).

Average wind speed in August
Madison, WI

Average wind speed in August - Madison, WI
  • Average wind speed in August: 6.6mph

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).

Average humidity in August
Madison, WI

Average humidity in August - Madison, WI
  • Average humidity in August: 82%

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

Average rainfall in August
Madison, WI

Average rainfall in August - Madison, WI
  • Average rainfall in August: 0.31"

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").

Average rainfall days in August
Madison, WI

Average rainfall days in August - Madison, WI
  • Average rainfall days in August: 5.4 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).

Average snowfall in August
Madison, WI

Average snowfall in August - Madison, WI
  • Average snowfall in August: 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").

Average snowfall days in August
Madison, WI

Average snowfall days in August - Madison, WI
  • Average snowfall days in August: 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).

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

Average daylight in August / Average sunshine in August - Madison, WI
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 9h and 4min

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).

Average sunshine days in August
Madison, WI

Average sunshine days in August - Madison, WI
  • Average sunshine days in August: 22.5 days

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

Average UV index in August
Madison, WI

Average UV index in August - Madison, WI
  • Average UV index in August: 5

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).

Average cloud cover in August
Madison, WI

Average cloud cover in August - Madison, WI
  • Average cloud cover in August: 34

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

Average visibility in August
Madison, WI

Average visibility in August - Madison, WI
  • Average visibility in August: 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).

Madison, Wisconsin, USA

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