August weather forecast
Edwardsville, IL

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Weather in August

August, the last month of the summer in Edwardsville, is also a moderately hot month, with temperature in the range of an average high of 84°F (28.9°C) and an average low of 65.7°F (18.7°C).

Temperature

Edwardsville measures an average high-temperature of a still warm 84°F (28.9°C) in August, nearly consistent with the preceding month. Edwardsville experiences an average temperature drop to an enjoyable 65.7°F (18.7°C) during August nights.

Heat index

August's mean heat index is appraised at a hot 93.2°F (34°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

The average relative humidity in August is 79%.

Rainfall

In Edwardsville, in August, it is raining for 14.3 days, with typically 2.91" (74mm) of accumulated precipitation. In Edwardsville, during the entire year, the rain falls for 138 days and collects up to 23.9" (607mm) of precipitation.

Snowfall

In Edwardsville, snow does not fall in May through October.

Daylight

In August, the average length of the day is 13h and 38min.
On the first day of August, sunrise is at 6:01 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:31 pm CDT.

Sunshine

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

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 exposure to the Sun's UV rays for ordinary individuals.
Note: In August, the average maximum UV index of 6 translates into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in August?

The average high-temperature, in August, in Edwardsville, is 84°F (28.9°C), while the average low-temperature is 65.7°F (18.7°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in August is appraised at 93.2°F (34°C).

What is the average humidity in August?

In Edwardsville, the average relative humidity in August is 79%.

How many days does it rain in August?

In Edwardsville, during August, the rain falls for 14.3 days and regularly aggregates up to 2.91" (74mm) of precipitation.

When it does not snow?

In Edwardsville, snow does not fall in May through October.

What is the average length of the day in August?

The average day length in August is 13h and 38min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 6:01 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:31 pm CDT.

How long on average sun shines in August?

In Edwardsville, the average sunshine duration in August is 10h.

What are the months with the highest UV index?

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?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from 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
Edwardsville, IL

Average temperature in August - Edwardsville, IL
  • Average high temperature in August: 84°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in August: 65.7°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in August
Edwardsville, IL

Average pressure in August - Edwardsville, 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 (29.92"Hg).

Average wind speed in August
Edwardsville, IL

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

The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

Average humidity in August
Edwardsville, IL

Average humidity in August - Edwardsville, IL
  • Average humidity in August: 79%

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Edwardsville, IL

Average rainfall in August - Edwardsville, IL
  • Average rainfall in August: 2.91"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").

Average rainfall days in August
Edwardsville, IL

Average rainfall days in August - Edwardsville, IL
  • Average rainfall days in August: 14.3 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (5.6 days).

Average snowfall in August
Edwardsville, IL

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

The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Edwardsville, IL

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

The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Edwardsville, 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 30min).

  • Average sunshine in August: 10h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).

Average sunshine days in August
Edwardsville, IL

Average sunshine days in August - Edwardsville, IL
  • Average sunshine days in August: 14 days

The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is July (12.3 days).

Average UV index in August
Edwardsville, IL

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

Average cloud cover in August
Edwardsville, IL

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

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).

Average visibility in August
Edwardsville, IL

Average visibility in August - Edwardsville, 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).

Edwardsville, Illinois, USA

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