August weather forecast
Champaign, IL

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An old building that works as an auditorium within the University of Illinois in Champaign
An old building that works as an auditorium within the University of Illinois in Champaign

Weather in August

August in Champaign carries forward the summer legacy with high temperatures and increased humidity. Despite a marginal dip in temperature from July, August maintains the weather in the high-summer range. This month, however, experiences less rainfall and more sunshine than its predecessor. The average daylight duration, nevertheless, takes a slight downturn but remains generously long. The decline in wind speed continues into this month as well, contributing to the overall calm and balmy ambiance.

Temperature

Champaign's weather in August indicates an average high-temperature of a still warm 80.6°F (27°C), nearly consistent with the 81.1°F (27.3°C) of July. Throughout the nights in August, Champaign experiences an average low-temperature of 63.3°F (17.4°C).

Heat index

The heat index value for August is estimated at a tropical 86°F (30°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

In August, the average relative humidity is 83%.

Rainfall

In Champaign, in August, it is raining for 13 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, there are 129.9 rainfall days, and 18.15" (461mm) of precipitation is accumulated.

Snowfall

In Champaign, Illinois, snow does not fall in May through October.

Daylight

The average length of the day in August is 13h and 43min.
On the first day of August, sunrise is at 5:51 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:25 pm CDT.

Sunshine

In Champaign, the average sunshine in August is 9.9h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index, 6 in August, converts into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

What are August temperatures in Champaign?

In Champaign, 80.6°F (27°C) is the average high-temperature and 63.3°F (17.4°C) is the average low-temperature during August. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 86°F (30°C).

What is the average humidity in August in Champaign?

In Champaign, the average relative humidity in August is 83%.

How many days does it rain in August in Champaign?

In Champaign, in August, during 13 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow in Champaign?

In Champaign, Illinois, snow does not fall in May through October.

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

In Champaign, Illinois, the average day length in August is 13h and 43min.

When is the sunrise / sunset in August in Champaign?

In August, on the first day of the month, sunrise is at 5:51 am and sunset at 8:06 pm. On the last day of the month, in Champaign, sunrise is at 6:20 am and sunset at 7:25 pm CDT.

How many hours of sunshine does Champaign have in August?

In Champaign, Illinois, the average sunshine duration in August is 9.9h.

What is the month with the highest UV index in Champaign?

The months with the highest UV index in Champaign, Illinois, are June through August, with an average maximum UV index of 6.

How high is the UV index in August in Champaign?

In Champaign, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's 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
Champaign, IL

Average temperature in August - Champaign, IL
  • Average high temperature in August: 80.6°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in August: 63.3°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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Average pressure in August
Champaign, IL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in August
Champaign, IL

Average wind speed in August - Champaign, IL
  • Average wind speed in August: 6.3mph

The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in August
Champaign, IL

Average humidity in August - Champaign, IL
  • Average humidity in August: 83%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in August
Champaign, IL

Average rainfall in August - Champaign, IL
  • Average rainfall in August: 1.54"

The wettest month (with the highest rainfall) is April (2.24").
The driest month (with the least rainfall) is September (0.94").

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Average rainfall days in August
Champaign, IL

Average rainfall days in August - Champaign, IL
  • Average rainfall days in August: 13 days

The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (6 days).

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Average snowfall in August
Champaign, IL

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

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Champaign, IL

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

The month with the highest number of snowfall days is January (8.7 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
Champaign, IL

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in August
Champaign, IL

Average sunshine days in August - Champaign, IL
  • Average sunshine days in August: 13.9 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in August
Champaign, IL

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

The months with the highest UV index are 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
Champaign, IL

Average cloud cover in August - Champaign, IL
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in August
Champaign, IL

Average visibility in August - Champaign, IL
  • Average visibility in August: 5mi

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

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Champaign, Illinois, USA

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