August weather forecast
La Grange, IL

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Weather in August

August, the last month of the summer in La Grange, is another warm month, with an average temperature ranging between min 65.3°F (18.5°C) and max 80.6°F (27°C).

Temperature

August denotes a minimal variation in the average high-temperature to a still moderately hot 80.6°F (27°C) from July's 81.9°F (27.7°C). Throughout August nights, La Grange registers an average low-temperature of 65.3°F (18.5°C).

Heat index

The heat index in August is appraised at 84.2°F (29°C). Continuing activity during long-lasting exposure might induce tiredness and result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in August in La Grange is 76%.

Rainfall

In La Grange, in August, it is raining for 17.4 days, with typically 3.46" (88mm) of accumulated precipitation. Throughout the year, there are 166.8 rainfall days, and 34.96" (888mm) of precipitation is accumulated.

Snowfall

In La Grange, snow does not fall in May through September.

Daylight

In August, the average length of the day in La Grange is 13h and 49min.
On the first day of the month, sunrise is at 5:46 am and sunset at 8:09 pm. On the last day of August, in La Grange, sunrise is at 6:17 am and sunset at 7:26 pm CDT.

Sunshine

August has the most sunshine of the year in La Grange, Illinois, with an average of 10.3h of sunshine.

UV index

July and 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 risk from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 6 in August leads to these recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average August temperature in La Grange?

The average high-temperature, in August, in La Grange, is 80.6°F (27°C), while the average low-temperature is 65.3°F (18.5°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 84.2°F (29°C).

What is the average humidity in August in La Grange?

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

How many days does it rain in August in La Grange?

In August, the rain falls for 17.4 days. Throughout August, 3.46" (88mm) of precipitation is accumulated.

When it does not snow in La Grange?

In La Grange, snow does not fall in May through September.

How many hours of daylight does La Grange have in August?

The average day length in August in La Grange, Illinois, is 13h and 49min.

When is the sunrise / sunset in August in La Grange?

On the first day of August in La Grange, Illinois, 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.

What month has the most sunshine in La Grange?

The month with the most sunshine in La Grange, Illinois, is August, with an average of 10.3h of sunshine.

How long on average sun shines in August in La Grange?

The average sunshine duration in August is 10.3h.

What are the months with the highest UV index in La Grange?

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

How high is the UV index in August in La Grange?

In La Grange, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability 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
La Grange, IL

Average temperature in August - La Grange, IL
  • Average high temperature in August: 80.6°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 (28.9°F).

  • Average low temperature in August: 65.3°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 (18.3°F).

Average pressure in August
La Grange, IL

Average pressure in August - La Grange, 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
La Grange, IL

Average wind speed in August - La Grange, 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
La Grange, IL

Average humidity in August - La Grange, 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 (72%).

Average rainfall in August
La Grange, IL

Average rainfall in August - La Grange, IL
  • Average rainfall in August: 3.46"

The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are November and December (1.77").

Average rainfall days in August
La Grange, IL

Average rainfall days in August - La Grange, IL
  • Average rainfall days in August: 17.4 days

The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (5.9 days).

Average snowfall in August
La Grange, IL

Average snowfall in August - La Grange, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is February (5.28").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
La Grange, IL

Average snowfall days in August - La Grange, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (13.3 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
La Grange, IL

Average daylight in August / Average sunshine in August - La Grange, 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 2min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in August
La Grange, IL

Average sunshine days in August - La Grange, IL
  • Average sunshine days in August: 9.5 days

The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is June (8.2 days).

Average UV index in August
La Grange, IL

Average UV index in August - La Grange, IL
  • Average UV index in August: 6

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

Average cloud cover in August
La Grange, IL

Average cloud cover in August - La Grange, IL
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in August
La Grange, IL

Average visibility in August - La Grange, 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).

La Grange, Illinois, USA

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