August weather forecastPreston Heights, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Preston Heights, Illinois, with an average temperature varying between 80.1°F (26.7°C) and 62.8°F (17.1°C).Temperature
The advent of August denotes an average high-temperature of a still warm 80.1°F (26.7°C), subtly different from July's 81.3°F (27.4°C). Preston Heights records an average low-temperature of 62.8°F (17.1°C) throughout the month of August.Humidity
In Preston Heights, Illinois, the average relative humidity in August is 82%.Rainfall
In Preston Heights, in August, it is raining for 15.8 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, in Preston Heights, there are 153.6 rainfall days, and 32.72" (831mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Preston Heights, Illinois.Daylight
In Preston Heights, the average length of the day in August is 13h and 47min.On the first day of August in Preston Heights, sunrise is at 5:47 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:26 pm CDT.
Sunshine
August has the most sunshine of the year, with an average of 9.7h of sunshine.UV index
In Preston Heights, Illinois, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In August, a daily maximum UV index of 5 leads to the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Preston Heights, IL
- Average high temperature in August: 80.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in August: 62.8°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in August
Preston Heights, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Preston Heights, IL
- Average wind speed in August: 5.9mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in August
Preston Heights, IL
- Average humidity in August: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Preston Heights, IL
- Average rainfall in August: 2.83"
The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is February (1.61").
Average rainfall days in August
Preston Heights, IL
- Average rainfall days in August: 15.8 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in August
Preston Heights, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Preston Heights, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (11.9 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
Preston Heights, IL
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 6min).
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 August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Preston Heights, IL
- Average sunshine days in August: 11.8 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in August
Preston Heights, IL
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Preston Heights, IL
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in August
Preston Heights, IL
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
