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
In August, Marengo experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 79.7°F (26.5°C) in July to a still moderately hot 78.1°F (25.6°C). Throughout August, Marengo witnesses a consistent average low-temperature of 60.4°F (15.8°C).Humidity
The average relative humidity in August is 84%.Rainfall
In Marengo, Illinois, during August, the rain falls for 16.1 days and regularly aggregates up to 3.03" (77mm) of precipitation. In Marengo, during the entire year, the rain falls for 154.6 days and collects up to 30.31" (770mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in August is 13h and 50min.On the first day of August, sunrise is at 5:48 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 7:29 pm CDT.
Sunshine
In Marengo, the average sunshine in August is 9.5h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 5 in August leads to these guidelines:
Take necessary precautions - Protection from skin and eye injury is mandatory. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August?
What is the average humidity in August?
How much does it rain in Marengo in August?
When it does not snow?
How many hours of daylight does Marengo have in August?
When is the sunrise / sunset in August?
How many hours of sunshine does Marengo have in August?
What is the month with the highest UV index in Marengo?
How high is the UV index in August?
Average temperature in August
Marengo, IL
- Average high temperature in August: 78.1°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in August: 60.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in August
Marengo, IL
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Marengo, IL
- Average wind speed in August: 6.1mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in August
Marengo, IL
- Average humidity in August: 84%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (76%).
Average rainfall in August
Marengo, IL
- Average rainfall in August: 3.03"
The wettest month (with the highest rainfall) is June (4.21").
The driest months (with the least rainfall) are February and November (1.5").
Average rainfall days in August
Marengo, IL
- Average rainfall days in August: 16.1 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in August
Marengo, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Marengo, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.3 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
Marengo, IL
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 9h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Marengo, IL
- Average sunshine days in August: 12.3 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (9.5 days).
Average UV index in August
Marengo, IL
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Marengo, IL
- Average cloud cover in August: 35
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in August
Marengo, IL
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Marengo, Illinois, USA
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