August weather forecast
Herod, IL

Weather in August

The last month of the summer, August, is another warm month in Herod, Illinois, with average temperature fluctuating between 66°F (18.9°C) and 85.6°F (29.8°C).

Temperature

In Herod, the average high-temperature in August is practically the same as in July - a warm 85.6°F (29.8°C). In Herod, the average low-temperature is 66°F (18.9°C).

Heat index

In August, the average heat index is computed to be a sweltering 96.8°F (36°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise 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. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 Herod is 76%.

Rainfall

In Herod, it is raining for 13.8 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, in Herod, Illinois, there are 158.6 rainfall days, and 36.02" (915mm) of precipitation is accumulated.

Snowfall

In Herod, Illinois, snow does not fall in May through September.

Daylight

In Herod, Illinois, the average length of the day is 13.6h.

Sunshine

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

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in August in Herod?

The average high-temperature, in August, in Herod, is 85.6°F (29.8°C), while the average low-temperature is 66°F (18.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in August is computed to be 96.8°F (36°C).

What is the average humidity in August in Herod?

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

How much does it rain in Herod in August?

In Herod, in August, it is raining for 13.8 days, with typically 2.52" (64mm) of accumulated precipitation.

When it does not snow in Herod?

May through September are months without snowfall in Herod.

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

In Herod, the average length of the day in August is 13.6h.

How many hours of sunshine does Herod have in August?

In August, the average sunshine is 10.3h.

When is the highest UV index in Herod?

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

What is the UV index intensity in August in Herod?

The average daily maximum UV index in August in Herod is 6. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.

Average temperature in August
Herod, IL

Average temperature in August - Herod, IL
  • Average high temperature in August: 85.6°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in August: 66°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 (26.2°F).

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Average pressure in August
Herod, IL

Average pressure in August - Herod, IL
  • Average pressure in August: 29.98"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in August
Herod, IL

Average wind speed in August - Herod, IL
  • Average wind speed in August: 5.8mph

The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in August
Herod, IL

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

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in August
Herod, IL

Average rainfall in August - Herod, IL
  • Average rainfall in August: 2.52"

The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (1.57").

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Average rainfall days in August
Herod, IL

Average rainfall days in August - Herod, IL
  • Average rainfall days in August: 13.8 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is November (9.7 days).

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Average snowfall in August
Herod, IL

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

The month with the highest snowfall is January (1.73").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Herod, IL

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

The month with the highest number of snowfall days is January (5.3 days).
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
Herod, IL

Average daylight in August / Average sunshine in August - Herod, IL
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in August: 10.3h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 4.6h).

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Average sunshine days in August
Herod, IL

Average sunshine days in August - Herod, IL
  • Average sunshine days in August: 15 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (9.9 days).

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Average UV index in August
Herod, IL

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

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

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Average cloud cover in August
Herod, IL

Average cloud cover in August - Herod, IL
  • Average cloud cover in August: 29

Months with the most cloud cover are January and February (Cloud cover 51).
Months with the least cloud cover are June and September (Cloud cover 28).

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Average visibility in August
Herod, IL

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

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

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