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 sea temperature 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
The average high-temperature in August, at a still warm 77.5°F (25.3°C), reveals a modest deviation from July's 77.7°F (25.4°C). Throughout the month of August, Lake Bluff witnesses an average low-temperature of 66.7°F (19.3°C).Humidity
In Lake Bluff, the average relative humidity in August is 76%.Rainfall
In Lake Bluff, in August, during 15.8 rainfall days, 3.07" (78mm) of precipitation is typically accumulated. Throughout the year, there are 154.1 rainfall days, and 30.24" (768mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Ocean temperature
With an average ocean temperature of 73.2°F (22.9°C), August is the month with the warmest seawater.Note: Think about diving into 73.2°F (22.9°C) waters. Factors like your sensitivity to cold, the brightness of the sun, wind conditions, and the day's warmth play a role. For reference, Olympic swimming competitions use waters between 77°F (25°C) and 82.4°F (28°C).
Daylight
In August, the average length of the day is 13h and 50min.On the first day of August, sunrise is at 5:44 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 7:26 pm CDT.
Sunshine
The month with the most sunshine is August, with an average of 10.7h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 6 during August translates into the following directions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Warning! The reflection of sand and water increases the UV dose.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What month is the ocean warmest?
How warm is the water in August?
What is the average length of the day in August?
When is the sunrise / sunset in August?
What month has the most sunshine?
How long on average sun shines in August?
When is the highest UV index?
What is the UV index intensity in August?
Average temperature in August
Lake Bluff, IL
- Average high temperature in August: 77.5°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in August: 66.7°F
The months with the highest average low temperature are July and August (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in August
Lake Bluff, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Lake Bluff, IL
- Average wind speed in August: 7.4mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).
Average humidity in August
Lake Bluff, IL
- Average humidity in August: 76%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Lake Bluff, IL
- Average rainfall in August: 3.07"
The wettest months (with the highest rainfall) are May and June (3.82").
The driest month (with the least rainfall) is December (1.3").
Average rainfall days in August
Lake Bluff, IL
- Average rainfall days in August: 15.8 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in August
Lake Bluff, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Lake Bluff, 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 sea temperature in August
Lake Bluff, IL
- Average sea temperature in August: 73.3°F
The best month for swimming (with the highest average sea temperature) is August (73.3°F).
The coldest month (with the lowest average sea temperature) is February (37.1°F).
Average daylight in August /
Average sunshine in August
Lake Bluff, IL
- Average daylight in August: 13h and 5min
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 6min).
- Average sunshine in August: 10h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in August
Lake Bluff, IL
- Average sunshine days in August: 13.1 days
The month with the most sunshine days is December (15.3 days).
The month with the least sunshine days is April (10.8 days).
Average UV index in August
Lake Bluff, 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 December (UV index 1).
Average cloud cover in August
Lake Bluff, IL
- Average cloud cover in August: 27
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in August
Lake Bluff, IL
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Lake Bluff, Illinois, USA
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