August weather forecastLake Zurich, IL

August

Weather in August

August, the last month of the summer in Lake Zurich, is another warm month, with an average temperature varying between 79.3°F (26.3°C) and 63.5°F (17.5°C).

Temperature

The average high-temperature in August, at a still warm 79.3°F (26.3°C), reveals a modest deviation from July's 80.6°F (27°C). Lake Zurich registers a consistent average low-temperature of 63.5°F (17.5°C) during August.

Humidity

In August, the average relative humidity in Lake Zurich is 78%.

Rainfall

In Lake Zurich, in August, it is raining for 16.9 days, with typically 3.11" (79mm) of accumulated precipitation. Throughout the year, there are 163.1 rainfall days, and 32.24" (819mm) of precipitation is accumulated.

Snowfall

In Lake Zurich, snow does not fall in June through September.

Daylight

The average length of the day in August in Lake Zurich is 13h and 50min.
On the first day of the month, sunrise is at 5:46 am and sunset at 8:11 pm. On the last day of August, in Lake Zurich, sunrise is at 6:17 am and sunset at 7:27 pm CDT.

Sunshine

The months with the most sunshine are July and August, with an average of 10.1h of sunshine.

UV index

The months with the highest UV index in Lake Zurich are July and August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In August, a regular UV index of 6 translates into these guidelines:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Lake Zurich, in August, the average high-temperature is 79.3°F (26.3°C), and the average low-temperature is 63.5°F (17.5°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is calculated to be 86°F (30°C).

In August, the average relative humidity is 78%.

In Lake Zurich, Illinois, in August, it is raining for 16.9 days, with typically 3.11" (79mm) of accumulated precipitation.

In Lake Zurich, Illinois, snow does not fall in June through September.

In Lake Zurich, Illinois, the average day length in August is 13h and 50min.

In August, on the first day of the month, sunrise is at 5:46 am and sunset at 8:11 pm. On the last day of the month, in Lake Zurich, Illinois, sunrise is at 6:17 am and sunset at 7:27 pm CDT.

July and August, with an average of 10.1h of sunshine, are months with the most sunshine.

In Lake Zurich, Illinois, the average sunshine duration in August is 10.1h.

The months with the highest UV index are July and August, with an average maximum UV index of 6.

The average daily maximum UV index in August in Lake Zurich, Illinois, is 6. A UV Index estimate of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Lake Zurich, IL

  • Average high temperature in August: 79.3°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in August: 63.5°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

Average pressure in August
Lake Zurich, 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
Lake Zurich, IL

  • Average wind speed in August: 6.2mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

Average humidity in August
Lake Zurich, IL

  • Average humidity in August: 78%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).

Average rainfall in August
Lake Zurich, IL

  • Average rainfall in August: 3.11"

The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is November (1.61").

Average rainfall days in August
Lake Zurich, IL

  • Average rainfall days in August: 16.9 days

The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (5.7 days).

Average snowfall in August
Lake Zurich, IL

  • Average snowfall in August: 0"

The month with the highest snowfall is February (6.22").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Lake Zurich, IL

  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Lake Zurich, 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: 10h and 6min

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in August
Lake Zurich, IL

  • Average sunshine days in August: 11.2 days

The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (8.4 days).

Average UV index in August
Lake Zurich, IL

  • Average UV index in August: 6

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in August
Lake Zurich, IL

  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 31).

Average visibility in August
Lake Zurich, 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).