August weather forecast
Glendale, IL

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Weather in August

The last month of the summer, August, is another hot month in Glendale, Illinois, with an average temperature fluctuating between 66.7°F (19.3°C) and 86.5°F (30.3°C).

Temperature

August's arrival brings an average high-temperature of a still hot 86.5°F (30.3°C), slightly deviating from July's 88°F (31.1°C). Glendale in August experiences a low-temperature average of 66.7°F (19.3°C).

Heat index

The heat index for August is appraised at a sweltering 98.6°F (37°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The average relative humidity in August is 76%.

Rainfall

In August, in Glendale, the rain falls for 11.9 days. Throughout August, 1.3" (33mm) of precipitation is accumulated. In Glendale, during the entire year, the rain falls for 118.3 days and collects up to 13.03" (331mm) of precipitation.

Snowfall

In Glendale, snow does not fall in April through October.

Daylight

In Glendale, the average length of the day in August is 13h and 34min.
On the first day of the month, sunrise is at 5:59 am and sunset at 8:02 pm. On the last day of August, sunrise is at 6:24 am and sunset at 7:24 pm CDT.

Sunshine

In Glendale, the average sunshine in August is 10.3h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: A maximum high daily UV index of 6 during August translates into the following directions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during August?

In August, in Glendale, the average high-temperature is 86.5°F (30.3°C), and the average low-temperature is 66.7°F (19.3°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is appraised at 98.6°F (37°C).

What is the average humidity in August?

In Glendale, the average relative humidity in August is 76%.

How many days does it rain in August?

In Glendale, in August, it is raining for 11.9 days, with typically 1.3" (33mm) of accumulated precipitation.

When it does not snow?

In Glendale, snow does not fall in April through October.

What is the average length of the day in August?

In August, the average day length is 13h and 34min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 5:59 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:24 pm CDT.

How many hours of sunshine does Glendale have in August?

The average sunshine duration in August in Glendale is 10.3h.

When is the highest UV index?

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

What is the UV index intensity in August?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk 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
Glendale, IL

Average temperature in August - Glendale, IL
  • Average high temperature in August: 86.5°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in August: 66.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).

Average pressure in August
Glendale, IL

Average pressure in August - Glendale, IL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in August
Glendale, IL

Average wind speed in August - Glendale, IL
  • Average wind speed in August: 5.7mph

The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in August
Glendale, IL

Average humidity in August - Glendale, IL
  • Average humidity in August: 76%

The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Glendale, IL

Average rainfall in August - Glendale, IL
  • Average rainfall in August: 1.3"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").

Average rainfall days in August
Glendale, IL

Average rainfall days in August - Glendale, IL
  • Average rainfall days in August: 11.9 days

The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).

Average snowfall in August
Glendale, IL

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

The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Glendale, IL

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

The month with the highest number of snowfall days is January (3.3 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
Glendale, IL

Average daylight in August / Average sunshine in August - Glendale, IL
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 10h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

Average sunshine days in August
Glendale, IL

Average sunshine days in August - Glendale, IL
  • Average sunshine days in August: 16.3 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).

Average UV index in August
Glendale, IL

Average UV index in August - Glendale, IL
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in August
Glendale, IL

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

The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).

Average visibility in August
Glendale, IL

Average visibility in August - Glendale, 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).

Glendale, Illinois, USA

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