August weather forecast
Evansville, IL

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Weather in August

August, the last month of the summer in Evansville, is also a moderately hot month, with an average temperature ranging between min 66°F (18.9°C) and max 85.5°F (29.7°C).

Temperature

As July transitions into August, Evansville records an average high-temperature of a warm 85.5°F (29.7°C), showing a gentle shift from the preceding month. An average low-temperature of 66°F (18.9°C) is observed in Evansville, Illinois, during the August nights.

Heat index

August's mean heat index is calculated to be a fiery hot 96.8°F (36°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular 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.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In August, the average relative humidity is 77%.

Rainfall

In August, in Evansville, Illinois, the rain falls for 13.7 days. Throughout August, 2.6" (66mm) of precipitation is accumulated. In Evansville, during the entire year, the rain falls for 138.9 days and collects up to 26.81" (681mm) of precipitation.

Snowfall

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

Daylight

In Evansville, the average length of the day in August is 13h and 35min.
On the first day of the month, sunrise is at 6:03 am and sunset at 8:08 pm. On the last day of August, in Evansville, sunrise is at 6:29 am and sunset at 7:30 pm CDT.

Sunshine

In Evansville, the average sunshine in August is 10.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 6 during August translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

How hot is it in Evansville in August?

The high-temperature, in August, in Evansville, is 85.5°F (29.7°C), while the low-temperature averages to 66°F (18.9°C). The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 96.8°F (36°C).

What is the average humidity in August in Evansville?

In Evansville, Illinois, the average relative humidity in August is 77%.

How many days does it rain in August in Evansville?

In Evansville, Illinois, during August, the rain falls for 13.7 days and regularly aggregates up to 2.6" (66mm) of precipitation.

When it does not snow in Evansville?

In Evansville, Illinois, snow does not fall in April through October.

How many hours of daylight does Evansville have in August?

The average day length in August in Evansville, Illinois, is 13h and 35min.

When are sunrise and sunset in August in Evansville?

In August, on the first day of the month, sunrise is at 6:03 am and sunset at 8:08 pm. On the last day of the month, in Evansville, sunrise is at 6:29 am and sunset at 7:30 pm CDT.

How long on average sun shines in August in Evansville?

In August, the average sunshine duration in Evansville is 10.2h.

When is the highest UV index in Evansville?

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

What is the UV index reading in August in Evansville?

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

Average temperature in August - Evansville, IL
  • Average high temperature in August: 85.5°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°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 (25.2°F).

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Average pressure in August
Evansville, IL

Average pressure in August - Evansville, 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 (29.93"Hg).

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Average wind speed in August
Evansville, IL

Average wind speed in August - Evansville, IL
  • Average wind speed in August: 5.5mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in August
Evansville, IL

Average humidity in August - Evansville, IL
  • Average humidity in August: 77%

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

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Average rainfall in August
Evansville, IL

Average rainfall in August - Evansville, IL
  • Average rainfall in August: 2.6"

The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is February (1.42").

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Average rainfall days in August
Evansville, IL

Average rainfall days in August - Evansville, IL
  • Average rainfall days in August: 13.7 days

The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (6.6 days).

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Average snowfall in August
Evansville, IL

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

The month with the highest snowfall is January (2.01").
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
Evansville, IL

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

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

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Average daylight in August /
Average sunshine in August
Evansville, IL

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

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in August
Evansville, IL

Average sunshine days in August - Evansville, IL
  • Average sunshine days in August: 14.5 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is July (12.3 days).

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Average UV index in August
Evansville, IL

Average UV index in August - Evansville, 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
Evansville, IL

Average cloud cover in August - Evansville, IL
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 27).

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Average visibility in August
Evansville, IL

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

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