August weather forecast
Northlake, IL

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Weather in August

The last month of the summer, August, is another warm month in Northlake, Illinois, with an average temperature varying between 65.7°F (18.7°C) and 80.2°F (26.8°C).

Temperature

As Northlake welcomes August, the average high-temperature records at a still moderately hot 80.2°F (26.8°C), marking an insignificant deviation from the prior month. August nights are marked by an average temperature drop to an enjoyable 65.7°F (18.7°C).

Humidity

In August, the average relative humidity is 74%.

Rainfall

In August, the rain falls for 16.6 days. Throughout August, 2.83" (72mm) of precipitation is accumulated. In Northlake, during the entire year, the rain falls for 149.4 days and collects up to 25.08" (637mm) of precipitation.

Snowfall

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

Daylight

In August, the average length of the day is 13h and 49min.
On the first day of August, sunrise is at 5:46 am and sunset at 8:09 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

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during August leads to these instructions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.

Frequently asked questions

What are August temperatures?

Northlake in August has an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 65.7°F (18.7°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in July is computed to be 87.8°F (31°C).

What is the average humidity in August?

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

How much does it rain in August?

In Northlake, 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 are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 5:46 am and sunset at 8:09 pm. On the last day of the month, in Northlake, sunrise is at 6:17 am and sunset at 7:26 pm CDT.

What are the months with the most sunshine?

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

How long on average sun shines in August?

In August, the average sunshine duration is 10.1h.

What are the months with the highest UV index?

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

How high is the UV index in August in Northlake?

In Northlake, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
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
Northlake, IL

Average temperature in August - Northlake, 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
Northlake, IL

Average pressure in August - Northlake, 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
Northlake, IL

Average wind speed in August - Northlake, 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
Northlake, IL

Average humidity in August - Northlake, 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
Northlake, IL

Average rainfall in August - Northlake, 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
Northlake, IL

Average rainfall days in August - Northlake, 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
Northlake, IL

Average snowfall in August - Northlake, 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
Northlake, IL

Average snowfall days in August - Northlake, 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
Northlake, IL

Average daylight in August / Average sunshine in August - Northlake, 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
Northlake, IL

Average sunshine days in August - Northlake, 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
Northlake, IL

Average UV index in August - Northlake, 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
Northlake, IL

Average cloud cover in August - Northlake, 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
Northlake, IL

Average visibility in August - Northlake, 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).

Northlake, Illinois, USA

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