August weather forecast
Cairo, IL

Weather in August

The last month of the summer, August, is also a hot month in Cairo, Illinois, with an average temperature ranging between min 67.5°F (19.7°C) and max 86.4°F (30.2°C).

Temperature

In August, the average high-temperature is essentially the same as in July - a still hot 86.4°F (30.2°C). The average low-temperature, in Cairo, is 67.5°F (19.7°C).

Heat index

In August, the average heat index is appraised at a torrid 98.8°F (37.1°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, wind). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in August in Cairo, Illinois, is 76%.

Rainfall

In August, in Cairo, the rain falls for 13.6 days. Throughout August, 2.72" (69mm) of precipitation is accumulated. Throughout the year, there are 156.3 rainfall days, and 36.65" (931mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 32min.
On the first day of the month, sunrise is at 6:02 am and sunset at 8:03 pm. On the last day of August, in Cairo, sunrise is at 6:26 am and sunset at 7:26 pm CDT.

Sunshine

In August, the average sunshine in Cairo is 10.4h.

UV index

May 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 health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against 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 the 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.
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FAQ

What is the temperature in August in Cairo?

In Cairo, Illinois, in August, the average high-temperature is 86.4°F (30.2°C), and the average low-temperature is 67.5°F (19.7°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 98.8°F (37.1°C).

What is the average humidity in August in Cairo?

In August, the average relative humidity is 76%.

How many days does it rain in August in Cairo?

In Cairo, in August, it is raining for 13.6 days, with typically 2.72" (69mm) of accumulated precipitation.

When it does not snow in Cairo?

May through September are months without snowfall.

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

The average day length in August is 13h and 32min.

When is the sunrise / sunset in August in Cairo?

On the first day of August in Cairo, sunrise is at 6:02 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:26 pm CDT.

How long on average sun shines in August in Cairo?

In August, the average sunshine duration is 10.4h.

When is the highest UV index in Cairo?

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

How high is the UV index in August in Cairo?

The average daily maximum UV index in August in Cairo, Illinois, 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 sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Cairo, IL

Average temperature in August - Cairo, IL
  • Average high temperature in August: 86.4°F

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (41.2°F).

  • Average low temperature in August: 67.5°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

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Average pressure in August
Cairo, IL

Average pressure in August - Cairo, 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 (29.94"Hg).

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Average wind speed in August
Cairo, IL

Average wind speed in August - Cairo, IL
  • Average wind speed in August: 5.7mph

The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in August
Cairo, IL

Average humidity in August - Cairo, IL
  • Average humidity in August: 76%

The months with the highest relative humidity are February, March, May and December (78%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in August
Cairo, IL

Average rainfall in August - Cairo, IL
  • Average rainfall in August: 2.72"

The wettest month (with the highest rainfall) is April (4.21").
The driest month (with the least rainfall) is September (1.42").

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Average rainfall days in August
Cairo, IL

Average rainfall days in August - Cairo, IL
  • Average rainfall days in August: 13.6 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.8 days).

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Average snowfall in August
Cairo, IL

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

The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Cairo, IL

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

The month with the highest number of snowfall days is February (3.8 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
Cairo, IL

Average daylight in August / Average sunshine in August - Cairo, IL
  • Average daylight in August: 13h and 32min

The month with the longest days is June (Average daylight: 14h and 40min).
The month with the shortest days is December (Average daylight: 9h and 40min).

  • Average sunshine in August: 10h and 24min

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in August
Cairo, IL

Average sunshine days in August - Cairo, IL
  • Average sunshine days in August: 15.1 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (12.3 days).

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Average UV index in August
Cairo, IL

Average UV index in August - Cairo, 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 and December (UV index 2).

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Average cloud cover in August
Cairo, IL

Average cloud cover in August - Cairo, IL
  • Average cloud cover in August: 27

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 26).

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Average visibility in August
Cairo, IL

Average visibility in August - Cairo, 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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