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 August's arrival, Mound City's weather records an average high-temperature of a still tropical 86.4°F (30.2°C), marking little difference from July's 88.2°F (31.2°C). Mound City records an average low of 67.5°F (19.7°C) throughout the nights in August.Heat index
August's mean heat index is evaluated at a fiery hot 98.6°F (37°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are primarily vital for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
In Mound City, the average relative humidity in August is 76%.Rainfall
In Mound City, in August, during 13.6 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, in Mound City, there are 156.3 rainfall days, and 36.65" (931mm) of precipitation is accumulated.Snowfall
In Mound City, snow does not fall in May through September.Daylight
The average length of the day in August is 13h and 32min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:03 pm. On the last day of August, sunrise is at 6:27 am and sunset at 7:26 pm CDT.
Sunshine
In August, the average sunshine is 10.4h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In August, the maximum UV index of 6 translates into these guidelines:
Deflect overexposure. Sun protection is a necessity. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in August?
What is the average humidity in August?
How many days does it rain in August in Mound City?
When it does not snow?
How many hours of daylight does Mound City have in August?
When are sunrise and sunset in August?
How long on average sun shines in August?
What are the months with the highest UV index in Mound City?
How high is the UV index in August?
Average temperature in August
Mound City, IL
- Average high temperature in August: 86.4°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in August: 67.5°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in August
Mound 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 (29.94"Hg).
Average wind speed in August
Mound City, IL
- Average wind speed in August: 5.7mph
The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in August
Mound City, IL
- Average humidity in August: 76%
The months with the highest relative humidity are February, March, May and December (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in August
Mound City, IL
- Average rainfall in August: 2.72"
The wettest month (with the highest rainfall) is April (4.21").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in August
Mound City, IL
- Average rainfall days in August: 13.6 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in August
Mound City, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Mound City, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.8 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
Mound City, IL
- Average daylight in August: 13h and 3min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in August: 10h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in August
Mound City, IL
- Average sunshine days in August: 15.1 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in August
Mound 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 and December (UV index 2).
Average cloud cover in August
Mound City, IL
- Average cloud cover in August: 27
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in August
Mound 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).
Mound City, Illinois, USA
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