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
With the onset of August, Chatham's average high-temperature clocks in at a still moderately hot 81.9°F (27.7°C), showing a minor fluctuation from the previous month. An average minimum temperature of 64.8°F (18.2°C) marks the month of August in Chatham, Illinois.Heat index
The heat index value during August is appraised at a hot 87.8°F (31°C). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.In the scope of the heat index, its values resonate with shade and light wind conditions. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
The average relative humidity in August in Chatham is 81%.Rainfall
In Chatham, in August, it is raining for 10.5 days, with typically 0.83" (21mm) of accumulated precipitation. In Chatham, during the entire year, the rain falls for 104.2 days and collects up to 9.29" (236mm) of precipitation.Snowfall
May through October are months without snowfall in Chatham.Daylight
In Chatham, the average length of the day in August is 13h and 41min.On the first day of August, sunrise is at 5:58 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:31 pm CDT.
Sunshine
The average sunshine in August in Chatham, Illinois, is 9.9h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 6 during August translates into the following directions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Chatham in August?
What is the average humidity in August in Chatham?
How much does it rain in Chatham in August?
When it does not snow in Chatham?
How many hours of daylight does Chatham have in August?
What time are sunrise and sunset in August in Chatham?
How long on average sun shines in August in Chatham?
When is the highest UV index in Chatham?
What is the UV index reading in August in Chatham?
Average temperature in August
Chatham, IL
- Average high temperature in August: 81.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in August: 64.8°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in August
Chatham, 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 (29.91"Hg).
Average wind speed in August
Chatham, IL
- Average wind speed in August: 6.2mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in August
Chatham, IL
- Average humidity in August: 81%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Chatham, IL
- Average rainfall in August: 0.83"
The wettest month (with the highest rainfall) is June (1.22").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in August
Chatham, IL
- Average rainfall days in August: 10.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in August
Chatham, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Chatham, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (5.7 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
Chatham, IL
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in August: 9h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in August
Chatham, IL
- Average sunshine days in August: 16.2 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14 days).
Average UV index in August
Chatham, IL
- Average UV index in August: 6
The months with the highest UV index are 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
Chatham, IL
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in August
Chatham, 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).
Chatham, Illinois, USA
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