August weather forecastGrandview, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Grandview, Illinois, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 64°F (17.8°C).Temperature
Grandview's average high-temperature in August is a still moderately hot 81.9°F (27.7°C), indicating a subtle variation from July. Nighttime temperature lowers to an average of 64°F (17.8°C) in August.Heat index
The heat index value during August is calculated to be a tropical 87.8°F (31°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.Records show heat index calculations are tailored for shaded regions and mild winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humidity
In Grandview, the average relative humidity in August is 81%.Rainfall
In Grandview, during August, the rain falls for 14.8 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, there are 140.2 rainfall days, and 23.27" (591mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Grandview, the average length of the day in August is 13h and 41min.On the first day of the month, sunrise is at 5:58 am and sunset at 8:11 pm. On the last day of August, sunrise is at 6:26 am and sunset at 7:30 pm CDT.
Sunshine
In August, the average sunshine 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 value of 6 to 7 symbolizes a high health risk 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:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Grandview, 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 (33.4°F).
- Average low temperature in August: 64°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in August
Grandview, 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
Grandview, IL
- Average wind speed in August: 6.2mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in August
Grandview, IL
- Average humidity in August: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Grandview, IL
- Average rainfall in August: 2.28"
The wettest month (with the highest rainfall) is June (2.72").
The driest month (with the least rainfall) is December (1.18").
Average rainfall days in August
Grandview, IL
- Average rainfall days in August: 14.8 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in August
Grandview, 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
Grandview, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (9.5 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
Grandview, IL
- Average daylight in August: 13h and 42min
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 54min
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
Grandview, IL
- Average sunshine days in August: 13.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in August
Grandview, 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
Grandview, IL
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in August
Grandview, 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).
