August weather forecastWinfield, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Winfield, Illinois, with an average temperature fluctuating between 64°F (17.8°C) and 80.4°F (26.9°C).Temperature
Winfield's shift into August sets the average high-temperature at a still warm 80.4°F (26.9°C), a figure that deviates only slightly from July's 81.7°F (27.6°C). In the month of August, Winfield witnesses a consistent average low-temperature of 64°F (17.8°C).Humidity
In Winfield, the average relative humidity in August is 77%.Rainfall
In Winfield, during August, the rain falls for 17.9 days and regularly aggregates up to 3.35" (85mm) of precipitation. Throughout the year, there are 164.3 rainfall days, and 33.78" (858mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Winfield.Daylight
In August, the average length of the day is 13h and 49min.On the first day of the month, sunrise is at 5:47 am and sunset at 8:10 pm. On the last day of August, sunrise is at 6:18 am and sunset at 7:27 pm CDT.
Sunshine
August has the most sunshine of the year, with an average of 9.9h of sunshine.UV index
The months with the highest UV index in Winfield 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 unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during August translates into these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. 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. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Winfield, IL
- Average high temperature in August: 80.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in August: 64°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in August
Winfield, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Winfield, IL
- Average wind speed in August: 6mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in August
Winfield, IL
- Average humidity in August: 77%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Winfield, IL
- Average rainfall in August: 3.35"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are November and December (1.65").
Average rainfall days in August
Winfield, IL
- Average rainfall days in August: 17.9 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in August
Winfield, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Winfield, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Winfield, 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 54min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Winfield, IL
- Average sunshine days in August: 9.3 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is July (8.2 days).
Average UV index in August
Winfield, IL
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Winfield, IL
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in August
Winfield, IL
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
