August weather forecastChestnut, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Chestnut, Illinois, with an average temperature fluctuating between 63.9°F (17.7°C) and 81.3°F (27.4°C).Temperature
Shifting into August, Chestnut records an average high-temperature of a still moderately hot 81.3°F (27.4°C), presenting minor fluctuations compared to the previous month. August in Chestnut, Illinois, sees the temperature falling to a mean low of 63.9°F (17.7°C).Heat index
The average heat index in August is appraised at a hot 87.8°F (31°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.When assessing, remember that heat index measurements are for light winds and shaded spots. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
The average relative humidity in August in Chestnut is 82%.Rainfall
In Chestnut, during August, the rain falls for 14.3 days and regularly aggregates up to 2.13" (54mm) of precipitation. Throughout the year, in Chestnut, there are 141.8 rainfall days, and 22.24" (565mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in August is 13h and 42min.On the first day of August, sunrise is at 5:55 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:29 pm CDT.
Sunshine
In Chestnut, the average sunshine in August is 9.7h.UV index
The months with the highest UV index in Chestnut are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 6 in August, converts into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Chestnut, IL
- Average high temperature in August: 81.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in August: 63.9°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in August
Chestnut, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Chestnut, IL
- Average wind speed in August: 6.3mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in August
Chestnut, IL
- Average humidity in August: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Chestnut, IL
- Average rainfall in August: 2.13"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in August
Chestnut, IL
- Average rainfall days in August: 14.3 days
The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in August
Chestnut, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Chestnut, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Chestnut, IL
- Average daylight in August: 13h and 42min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in August: 9h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in August
Chestnut, IL
- Average sunshine days in August: 13.1 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in August
Chestnut, IL
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Chestnut, IL
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June and September (Cloud cover 31).
Average visibility in August
Chestnut, IL
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
