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
August's beginning signals an average high-temperature of a still moderately hot 82°F (27.8°C), barely different from July's 82.8°F (28.2°C). Nighttime temperature in Marietta experiences an average drop to a comfortable 63.7°F (17.6°C) in August.Heat index
The heat index in August is calculated to be a hot 89.6°F (32°C). If one remains active during constant exposure, it might cause exhaustion and heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
In August, the average relative humidity is 80%.Rainfall
In Marietta, during August, the rain falls for 13.2 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, in Marietta, Illinois, there are 131.7 rainfall days, and 22.48" (571mm) of precipitation is accumulated.Snowfall
In Marietta, snow does not fall in May through September.Daylight
The average length of the day in August is 13h and 44min.On the first day of August, sunrise is at 5:59 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:34 pm CDT.
Sunshine
In August, the average sunshine is 9.9h.UV index
The months with the highest UV index in Marietta are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In August, an average UV index of 6 transforms into the following instructions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August in Marietta?
What is the average humidity in August in Marietta?
How many days does it rain in August in Marietta?
When it does not snow in Marietta?
What is the average length of the day in August in Marietta?
What time are sunrise and sunset in August in Marietta?
How many hours of sunshine does Marietta have in August?
What is the month with the highest UV index in Marietta?
What is the UV index intensity in August in Marietta?
Average temperature in August
Marietta, IL
- Average high temperature in August: 82°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 (31.5°F).
- Average low temperature in August: 63.7°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in August
Marietta, IL
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Marietta, IL
- Average wind speed in August: 6.5mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in August
Marietta, IL
- Average humidity in August: 80%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Marietta, IL
- Average rainfall in August: 1.89"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is December (0.94").
Average rainfall days in August
Marietta, IL
- Average rainfall days in August: 13.2 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (4.7 days).
Average snowfall in August
Marietta, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Marietta, 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, August and September (0 days).
Average daylight in August /
Average sunshine in August
Marietta, IL
- Average daylight in August: 13h and 4min
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 18min).
- Average sunshine in August: 9h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in August
Marietta, IL
- Average sunshine days in August: 14.6 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in August
Marietta, 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
Marietta, IL
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in August
Marietta, 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).
Marietta, Illinois, USA
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