August weather forecast
Peoria, IL

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Street lights and tall buildings in the city of Peoria, Illinois, as well as the night sky reflected in the waterfront
Street lights and tall buildings in the city of Peoria, Illinois, as well as the night sky reflected in the waterfront

Weather in August

As the fading summer sun marks August in Peoria, the weather begins a slow descent towards fall. Although sharing similar traits with the previous month of July, August has slightly lower temperatures and a diminished rainfall quantity. Nevertheless, it remains significantly warmer with the sun still governing the skies. This month is typically characterized by extended daylight hours, high levels of humidity, and relative calmness in wind activity. Evening cookouts, relaxation in pools, and visits to air-conditioned malls dominate the social scene in Peoria during this final stretch of summer.

Temperature

The commencement of August notes an average high-temperature of a still moderately hot 81.1°F (27.3°C), exhibiting little difference from the previous month. August in Peoria generally records an average low-temperature of 63.3°F (17.4°C).

Heat index

The heat index value for August is estimated at a tropical 87.8°F (31°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.

Humidity

The average relative humidity in August in Peoria is 81%.

Rainfall

In Peoria, in August, during 12.3 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, in Peoria, there are 129.2 rainfall days, and 17.24" (438mm) of precipitation is accumulated.

Snowfall

In Peoria, snow does not fall in May through September.

Daylight

The average length of the day in August in Peoria is 13h and 44min.
On the first day of August, sunrise is at 5:55 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:31 pm CDT.

Sunshine

In August, the average sunshine in Peoria is 10h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Peoria. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Fend off overexposure. Sun protection is vital. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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Frequently asked questions

What is the average August temperature in Peoria?

The high-temperature, in August, in Peoria, is 81.1°F (27.3°C), while the low-temperature averages to 63.3°F (17.4°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, in August is estimated at 87.8°F (31°C).

What is the average humidity in August in Peoria?

In August, the average relative humidity in Peoria, Illinois, is 81%.

How much does it rain in Peoria in August?

In Peoria, Illinois, in August, during 12.3 rainfall days, 1.3" (33mm) of precipitation is typically accumulated.

When it does not snow in Peoria?

In Peoria, snow does not fall in May through September.

How many hours of daylight does Peoria have in August?

The average day length in August in Peoria, Illinois, is 13h and 44min.

What time are sunrise and sunset in August in Peoria?

On the first day of August, sunrise is at 5:55 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:31 pm CDT.

How long on average sun shines in August in Peoria?

The average sunshine duration in August in Peoria is 10h.

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

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

What is the UV index reading in August in Peoria?

In Peoria, Illinois, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health 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
Peoria, IL

Average temperature in August - Peoria, IL
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in August: 63.3°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in August
Peoria, IL

Average pressure in August - Peoria, IL
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in August
Peoria, IL

Average wind speed in August - Peoria, IL
  • Average wind speed in August: 6.5mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average humidity in August
Peoria, IL

Average humidity in August - Peoria, IL
  • Average humidity in August: 81%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Peoria, IL

Average rainfall in August - Peoria, IL
  • Average rainfall in August: 1.3"

The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days in August
Peoria, IL

Average rainfall days in August - Peoria, IL
  • Average rainfall days in August: 12.3 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (4.6 days).

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Average snowfall in August
Peoria, IL

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

The month with the highest snowfall is January (2.36").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Peoria, IL

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

The month with the highest number of snowfall days is January (9 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
Peoria, IL

Average daylight in August / Average sunshine in August - Peoria, 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 18min).

  • Average sunshine in August: 10h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in August
Peoria, IL

Average sunshine days in August - Peoria, IL
  • Average sunshine days in August: 16.4 days

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in August
Peoria, IL

Average UV index in August - Peoria, 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
Peoria, IL

Average cloud cover in August - Peoria, IL
  • Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in August
Peoria, IL

Average visibility in August - Peoria, 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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Peoria, Illinois, USA

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