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
Stepping into August, Sherman records an average high-temperature of a still warm 81.7°F (27.6°C), almost consistent with July. An average low-temperature of 64°F (17.8°C) marks the nights throughout August.Heat index
The heat index in August is calculated to be a hot 87.8°F (31°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.Take note of the fact that heat index values are based on shaded circumstances with light airflows. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Humidity
The average relative humidity in August is 82%.Rainfall
In August, the rain falls for 12.8 days. Throughout August, 1.89" (48mm) of precipitation is accumulated. In Sherman, Illinois, during the entire year, the rain falls for 131.5 days and collects up to 18.54" (471mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in August is 13h and 42min.On the first day of the month, sunrise is at 5:57 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 Sherman, the average sunshine in August is 9.9h.UV index
The months with the highest UV index in Sherman 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 average person.Note: During August, 6 as the daily maximum UV index converts into the following advice:
Guard against overexposure. Protection from sun-induced harm is essential. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
How many hours of daylight does Sherman have in August?
What time are sunrise and sunset in August?
How many hours of sunshine does Sherman have in August?
What is the month with the highest UV index in Sherman?
What is the UV index reading in August?
Average temperature in August
Sherman, IL
- Average high temperature in August: 81.7°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 (33.1°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
Sherman, 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
Sherman, IL
- Average wind speed in August: 6.2mph
The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in August
Sherman, IL
- Average humidity in August: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Sherman, IL
- Average rainfall in August: 1.89"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is December (0.83").
Average rainfall days in August
Sherman, IL
- Average rainfall days in August: 12.8 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in August
Sherman, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Sherman, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (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
Sherman, 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 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 6min).
Average sunshine days in August
Sherman, IL
- Average sunshine days in August: 14.7 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in August
Sherman, 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
Sherman, 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, August and September (Cloud cover 30).
Average visibility in August
Sherman, 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).
Sherman, Illinois, USA
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