August weather forecast
Madison, IL

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Weather in August

August, the last month of the summer in Madison, is also a moderately hot month, with an average temperature ranging between min 66.7°F (19.3°C) and max 84.7°F (29.3°C).

Temperature

An average high-temperature of a moderately hot 84.7°F (29.3°C) marks August, exhibiting a close resemblance to the conditions in July. Madison's temperature drops to an average low of 66.7°F (19.3°C) during the nights of August.

Heat index

In August, the heat index is calculated to be a torrid 95°F (35°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In August, the average relative humidity in Madison is 77%.

Rainfall

In Madison, during August, the rain falls for 15.3 days and regularly aggregates up to 3.82" (97mm) of precipitation. In Madison, during the entire year, the rain falls for 159.5 days and collects up to 36.06" (916mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in August in Madison is 13h and 38min.
On the first day of August in Madison, sunrise is at 6:02 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 7:31 pm CDT.

Sunshine

In Madison, the average sunshine in August is 10.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Madison. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum daily UV index of 6 during August morphs into the following directions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

Is it hot in Madison during August?

Madison in August has an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 66.7°F (19.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 95°F (35°C).

What is the average humidity in August in Madison?

In Madison, Illinois, the average relative humidity in August is 77%.

How many days does it rain in August in Madison?

In August, in Madison, the rain falls for 15.3 days. Throughout August, 3.82" (97mm) of precipitation is accumulated.

When it does not snow in Madison?

In Madison, snow does not fall in April through October.

How many hours of daylight does Madison have in August?

The average day length in August in Madison is 13h and 38min.

When are sunrise and sunset in August in Madison?

On the first day of August, sunrise is at 6:02 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 7:31 pm CDT.

How long on average sun shines in August in Madison?

In August, the average sunshine duration in Madison is 10.2h.

What are the months with the highest UV index in Madison?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

How high is the UV index in August in Madison?

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.
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, IL

Average temperature in August - Madison, IL
  • Average high temperature in August: 84.7°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37.2°F).

  • Average low temperature in August: 66.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in August
Madison, IL

Average pressure in August - Madison, IL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in August
Madison, IL

Average wind speed in August - Madison, IL
  • Average wind speed in August: 5.6mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

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Average humidity in August
Madison, IL

Average humidity in August - Madison, IL
  • Average humidity in August: 77%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Madison, IL

Average rainfall in August - Madison, IL
  • Average rainfall in August: 3.82"

The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is February (1.93").

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Average rainfall days in August
Madison, IL

Average rainfall days in August - Madison, IL
  • Average rainfall days in August: 15.3 days

The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in August
Madison, IL

Average snowfall in August - Madison, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.4").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in August
Madison, IL

Average snowfall days in August - Madison, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Madison, IL
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in August
Madison, IL

Average sunshine days in August - Madison, IL
  • Average sunshine days in August: 12.5 days

The month with the most sunshine days is December (18 days).
The month with the least sunshine days is June (10.1 days).

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Average UV index in August
Madison, IL

Average UV index in August - Madison, IL
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in August
Madison, IL

Average cloud cover in August - Madison, IL
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 28).

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Average visibility in August
Madison, IL

Average visibility in August - Madison, IL
  • Average visibility in August: 6mi

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

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Madison, Illinois, USA

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