August weather forecast
Karnak, IL

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Weather in August

August, the last month of the summer in Karnak, is also a hot month, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 86.5°F (30.3°C).

Temperature

With the start of August, Karnak measures an average high-temperature of a still hot 86.5°F (30.3°C), not significantly differing from July's 88°F (31.1°C). In Karnak, August is marked by an average low-temperature of 66.7°F (19.3°C).

Heat index

August's heat index is computed to be a very hot 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In Karnak, the average relative humidity in August is 76%.

Rainfall

In Karnak, in August, it is raining for 11.9 days, with typically 1.3" (33mm) of accumulated precipitation. In Karnak, during the entire year, the rain falls for 118.3 days and collects up to 13.03" (331mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in August in Karnak is 13h and 33min.
On the first day of the month, sunrise is at 6:01 am and sunset at 8:03 pm. On the last day of August, in Karnak, sunrise is at 6:26 am and sunset at 7:25 pm CDT.

Sunshine

In Karnak, Illinois, the average sunshine in August is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Karnak. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In August, the UV index of 6 transforms into the following advice:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

How hot does it get in Karnak in August?

The average high-temperature, in August, in Karnak, is 86.5°F (30.3°C), while the average low-temperature is 66.7°F (19.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 98.6°F (37°C).

What is the average humidity in August in Karnak?

The average relative humidity in August in Karnak is 76%.

How many days does it rain in August in Karnak?

In Karnak, in August, it is raining for 11.9 days, with typically 1.3" (33mm) of accumulated precipitation.

When it does not snow in Karnak?

April through October are months without snowfall in Karnak.

How many hours of daylight does Karnak have in August?

In August, the average day length in Karnak is 13h and 33min.

When is the sunrise / sunset in August in Karnak?

On the first day of August in Karnak, Illinois, sunrise is at 6:01 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:25 pm CDT.

How many hours of sunshine does Karnak have in August?

The average sunshine duration in August is 10.3h.

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

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

How high is the UV index in August in Karnak?

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

Average temperature in August - Karnak, IL
  • Average high temperature in August: 86.5°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°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 (27°F).

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Average pressure in August
Karnak, IL

Average pressure in August - Karnak, 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
Karnak, IL

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

The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in August
Karnak, IL

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

The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Karnak, IL

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

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").

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Average rainfall days in August
Karnak, IL

Average rainfall days in August - Karnak, IL
  • Average rainfall days in August: 11.9 days

The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).

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Average snowfall in August
Karnak, IL

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

The month with the highest snowfall is February (0.67").
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
Karnak, IL

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

The month with the highest number of snowfall days is January (3.3 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
Karnak, IL

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 10h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

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Average sunshine days in August
Karnak, IL

Average sunshine days in August - Karnak, IL
  • Average sunshine days in August: 16.3 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).

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Average UV index in August
Karnak, IL

Average UV index in August - Karnak, 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
Karnak, IL

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

The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).

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Average visibility in August
Karnak, IL

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

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