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
Granite City experiences an average high-temperature of a warm 84.7°F (29.3°C) with the onset of August, subtly varied from July's 86.2°F (30.1°C). During August, Granite City observes a consistent average nighttime temperature of 66.7°F (19.3°C).Heat index
The heat index in August is estimated at a sweltering 95°F (35°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
In Granite City, the average relative humidity in August is 77%.Rainfall
In Granite City, in August, during 15.3 rainfall days, 3.82" (97mm) of precipitation is typically accumulated. In Granite City, during the entire year, the rain falls for 159.5 days and collects up to 36.06" (916mm) of precipitation.Snowfall
In Granite City, snow does not fall in April through October.Daylight
The average length of the day in August in Granite City is 13h and 38min.On the first day of August, sunrise is at 6:02 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 7:31 pm CDT.
Sunshine
The average sunshine in August in Granite City is 10.2h.UV index
The months with the highest UV index in Granite City are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 6 in August translates into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
How hot is it in Granite City in August?
What is the average humidity in August in Granite City?
How much does it rain in Granite City in August?
When it does not snow in Granite City?
What is the average length of the day in August in Granite City?
When are sunrise and sunset in August in Granite City?
How many hours of sunshine does Granite City have in August?
What is the month with the highest UV index in Granite City?
How high is the UV index in August in Granite City?
Average temperature in August
Granite City, IL
- Average high temperature in August: 84.7°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in August: 66.7°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 (24.3°F).
Average pressure in August
Granite City, 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
Granite City, 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 July (5.5mph).
Average humidity in August
Granite City, IL
- Average humidity in August: 77%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Granite City, IL
- Average rainfall in August: 3.82"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days in August
Granite City, IL
- Average rainfall days in August: 15.3 days
The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in August
Granite City, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Granite City, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.3 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
Granite City, 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 36min).
Average sunshine days in August
Granite City, IL
- Average sunshine days in August: 12.5 days
The month with the most sunshine days is December (18 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in August
Granite City, 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
Granite City, IL
- Average cloud cover in August: 28
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in August
Granite City, 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).
Granite City, Illinois, USA
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