August weather forecastShirley, IL
August
Weather in August
August, the last month of the summer in Shirley, is also a moderately hot month, with an average temperature fluctuating between 79.9°F (26.6°C) and 63°F (17.2°C).Temperature
Shirley observes a minor difference in average high-temperatures between July's 80.8°F (27.1°C) and August's 79.9°F (26.6°C). An average low-temperature of 63°F (17.2°C) marks the nights throughout August.Humidity
In Shirley, Illinois, the average relative humidity in August is 83%.Rainfall
In Shirley, during August, the rain falls for 14.1 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Shirley, Illinois, during the entire year, the rain falls for 140.6 days and collects up to 22.44" (570mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In August, the average length of the day in Shirley is 13h and 44min.On the first day of August in Shirley, sunrise is at 5:54 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:29 pm CDT.
Sunshine
In August, the average sunshine is 9.5h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 6 during August translates into these guidelines:
Shun overexposure. Protection from sun ravages is indispensable. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Shirley, IL
- Average high temperature in August: 79.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in August: 63°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in August
Shirley, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Shirley, IL
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in August
Shirley, IL
- Average humidity in August: 83%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Shirley, IL
- Average rainfall in August: 2.01"
The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in August
Shirley, IL
- Average rainfall days in August: 14.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in August
Shirley, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.44").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Shirley, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (11.5 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
Shirley, IL
- Average daylight in August: 13h and 42min
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 30min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Shirley, IL
- Average sunshine days in August: 12.8 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.7 days).
Average UV index in August
Shirley, 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
Shirley, IL
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in August
Shirley, 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).
