August weather forecastStillman Valley, IL
August
Weather in August
The last month of the summer, August, is another warm month in Stillman Valley, Illinois, with temperature in the range of an average high of 78.1°F (25.6°C) and an average low of 60.6°F (15.9°C).Temperature
Stillman Valley registers an average high-temperature of a still moderately hot 78.1°F (25.6°C) with the arrival of August, showing minor deviation from the preceding month. August nights are marked by an average temperature drop to a mild 60.6°F (15.9°C).Humidity
In August, the average relative humidity in Stillman Valley is 84%.Rainfall
In Stillman Valley, Illinois, during August, the rain falls for 10.3 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Stillman Valley, during the entire year, the rain falls for 100.6 days and collects up to 7.99" (203mm) 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 the month, sunrise is at 5:50 am and sunset at 8:15 pm. On the last day of August, sunrise is at 6:21 am and sunset at 7:31 pm CDT.
Sunshine
In Stillman Valley, the average sunshine in August is 9.7h.UV index
In Stillman Valley, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 in August converts into the following recommendations:
Take precautions - Protection against sunburn is recommended. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Stillman Valley, IL
- Average high temperature in August: 78.1°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in August: 60.6°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in August
Stillman Valley, IL
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Stillman Valley, IL
- Average wind speed in August: 6.3mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in August
Stillman Valley, IL
- Average humidity in August: 84%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in August
Stillman Valley, IL
- Average rainfall in August: 0.59"
The wettest month (with the highest rainfall) is May (1.18").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days in August
Stillman Valley, IL
- Average rainfall days in August: 10.3 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in August
Stillman Valley, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Stillman Valley, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.1 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
Stillman Valley, IL
- Average daylight in August: 13h and 48min
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 42min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Stillman Valley, IL
- Average sunshine days in August: 18 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in August
Stillman Valley, IL
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Stillman Valley, IL
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in August
Stillman Valley, IL
- Average visibility in August: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
