Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The arrival of August sees a recorded average high-temperature of a still warm 84°F (28.9°C), showing little divergence from the previous month's conditions. Caseyville usually reports an average low-temperature of 66°F (18.9°C) during the month of August.Heat index
The heat index in August is calculated to be a tropical 93.2°F (34°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. 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. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
The months with the highest humidity in Caseyville are May, July and August, with an average relative humidity of 79%.Rainfall
In Caseyville, during August, the rain falls for 13.1 days and regularly aggregates up to 3.35" (85mm) of precipitation. Throughout the year, in Caseyville, there are 149.9 rainfall days, and 33.94" (862mm) of precipitation is accumulated.Snowfall
In Caseyville, Illinois, snow does not fall in April through August and October.Daylight
In Caseyville, the average length of the day in August is 13h and 37min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:10 pm. On the last day of August, in Caseyville, sunrise is at 6:29 am and sunset at 7:31 pm CDT.
Sunshine
The average sunshine in August in Caseyville is 10.1h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 6 in August converts into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
Is it hot in Caseyville during August?
What are the most humid months in Caseyville?
What is the average humidity in August in Caseyville?
How much does it rain in Caseyville in August?
When it does not snow in Caseyville?
Does it snow in Caseyville in August?
How many hours of daylight does Caseyville have in August?
When are sunrise and sunset in August in Caseyville?
How many hours of sunshine does Caseyville have in August?
When is the highest UV index in Caseyville?
What is the UV index intensity in August in Caseyville?
Average temperature in August
Caseyville, IL
- Average high temperature in August: 84°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in August: 66°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in August
Caseyville, 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
Caseyville, IL
- Average wind speed in August: 5.7mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity in August
Caseyville, IL
- Average humidity in August: 79%
The months with the highest relative humidity are May, July and August (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Caseyville, IL
- Average rainfall in August: 3.35"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (1.77").
Average rainfall days in August
Caseyville, IL
- Average rainfall days in August: 13.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in August
Caseyville, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in August
Caseyville, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Caseyville, 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 1min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in August
Caseyville, IL
- Average sunshine days in August: 15.3 days
The month with the most sunshine days is December (18.6 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in August
Caseyville, 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
Caseyville, IL
- Average cloud cover in August: 28
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in August
Caseyville, 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).
Caseyville, Illinois, USA
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