August weather forecast
Addison, IL

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Weather in August

August, the last month of the summer in Addison, is also a moderately hot month, with an average temperature fluctuating between 65.7°F (18.7°C) and 80.2°F (26.8°C).

Temperature

The beginning of August reveals an average high-temperature of a still moderately hot 80.2°F (26.8°C), showing minimal deviation from the previous month. Addison observes an average low-temperature of 65.7°F (18.7°C) during August nights.

Humidity

In August, the average relative humidity in Addison is 74%.

Rainfall

In Addison, in August, during 16.6 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. Throughout the year, there are 149.4 rainfall days, and 25.08" (637mm) of precipitation is accumulated.

Snowfall

In Addison, snow does not fall in June through September.

Daylight

The average length of the day in August in Addison is 13h and 49min.
On the first day of August, sunrise is at 5:46 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:26 pm CDT.

Sunshine

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

UV index

The months with the highest UV index are June through 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 average individuals.
Note: A maximum high UV index of 6 in August translates into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Jul 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average August temperature?

An average high-temperature, in August, in Addison, is 80.2°F (26.8°C) and the average low-temperature is 65.7°F (18.7°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, is evaluated at 87.8°F (31°C).

What is the average humidity in August?

In Addison, the average relative humidity in August is 74%.

How many days does it rain in August?

In Addison, during August, the rain falls for 16.6 days and regularly aggregates up to 2.83" (72mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

What is the average length of the day in August?

In August, the average day length is 13h and 49min.

When is the sunrise / sunset in August?

On the first day of August in Addison, sunrise is at 5:46 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:26 pm CDT.

What is the month with the most sunshine?

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

How long on average sun shines in August?

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

What is the month with the highest UV index?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in August?

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Addison, IL

Average temperature in August - Addison, IL
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in August: 65.7°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in August
Addison, IL

Average pressure in August - Addison, 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
Addison, IL

Average wind speed in August - Addison, IL
  • Average wind speed in August: 6.3mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in August
Addison, IL

Average humidity in August - Addison, IL
  • Average humidity in August: 74%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

Average rainfall in August
Addison, IL

Average rainfall in August - Addison, IL
  • Average rainfall in August: 2.83"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").

Average rainfall days in August
Addison, IL

Average rainfall days in August - Addison, IL
  • Average rainfall days in August: 16.6 days

The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is February (5.1 days).

Average snowfall in August
Addison, IL

Average snowfall in August - Addison, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Addison, IL

Average snowfall days in August - Addison, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Addison, IL

Average daylight in August / Average sunshine in August - Addison, 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 12min).

  • Average sunshine in August: 10h and 1min

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
Addison, IL

Average sunshine days in August - Addison, IL
  • Average sunshine days in August: 11.3 days

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in August
Addison, IL

Average UV index in August - Addison, 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 and December (UV index 1).

Average cloud cover in August
Addison, IL

Average cloud cover in August - Addison, IL
  • Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in August
Addison, IL

Average visibility in August - Addison, 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).

Addison, Illinois, USA

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