August weather forecast
De Soto, IL

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Weather in August

The last month of the summer, August, is another warm month in De Soto, Illinois, with an average temperature ranging between min 66.4°F (19.1°C) and max 85.8°F (29.9°C).

Temperature

The shift from July to August is characterized by an average high-temperature of a moderately hot 85.8°F (29.9°C), not significantly different from the 87.4°F (30.8°C) of July. De Soto observes an average nighttime temperature of 66.4°F (19.1°C) during August.

Heat index

For most parts of August, the heat index is evaluated at a sweltering 96.8°F (36°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
In reference to the heat index, it's for places in shade and with a slight wind. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

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

Rainfall

In De Soto, in August, during 13.9 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, in De Soto, there are 158.6 rainfall days, and 34.69" (881mm) of precipitation is accumulated.

Snowfall

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

Daylight

In De Soto, Illinois, the average length of the day in August is 13h and 35min.
On the first day of August, sunrise is at 6:01 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:27 pm CDT.

Sunshine

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

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In August, a regular UV index of 6 translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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 hat with a broad brim is indispensable, filtering out up to half of UV rays.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in De Soto in August?

During August, De Soto experiences an average high-temperature of 85.8°F (29.9°C) and a low-temperature of 66.4°F (19.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is evaluated at 96.8°F (36°C).

What is the average humidity in August in De Soto?

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

How many days does it rain in August in De Soto?

In De Soto, Illinois, in August, during 13.9 rainfall days, 2.8" (71mm) of precipitation is typically accumulated.

When it does not snow in De Soto?

May through September are months without snowfall.

What is the average length of the day in August in De Soto?

In De Soto, Illinois, the average day length in August is 13h and 35min.

When are sunrise and sunset in August in De Soto?

In August, on the first day of the month, sunrise is at 6:01 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:27 pm CDT.

How many hours of sunshine does De Soto have in August?

In De Soto, Illinois, the average sunshine duration in August is 10.3h.

What is the month with the highest UV index in De Soto?

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

What is the UV index reading in August in De Soto?

The average daily maximum UV index in August in De Soto is 6. A UV Index estimate 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
De Soto, IL

Average temperature in August - De Soto, IL
  • Average high temperature in August: 85.8°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in August: 66.4°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

Average pressure in August
De Soto, IL

Average pressure in August - De Soto, 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).

Average wind speed in August
De Soto, IL

Average wind speed in August - De Soto, IL
  • Average wind speed in August: 5.6mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in August
De Soto, IL

Average humidity in August - De Soto, 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 (71%).

Average rainfall in August
De Soto, IL

Average rainfall in August - De Soto, IL
  • Average rainfall in August: 2.8"

The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in August
De Soto, IL

Average rainfall days in August - De Soto, IL
  • Average rainfall days in August: 13.9 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.4 days).

Average snowfall in August
De Soto, IL

Average snowfall in August - De Soto, IL
  • Average snowfall in August: 0"

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

Average snowfall days in August
De Soto, IL

Average snowfall days in August - De Soto, IL
  • Average snowfall days in August: 0 days

The months with the highest number of snowfall days are January and February (4.8 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
De Soto, IL

Average daylight in August / Average sunshine in August - De Soto, 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 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).

Average sunshine days in August
De Soto, IL

Average sunshine days in August - De Soto, IL
  • Average sunshine days in August: 14.2 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (11.3 days).

Average UV index in August
De Soto, IL

Average UV index in August - De Soto, 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
De Soto, IL

Average cloud cover in August - De Soto, IL
  • Average cloud cover in August: 27

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).

Average visibility in August
De Soto, IL

Average visibility in August - De Soto, 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).

De Soto, Illinois, USA

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