August weather forecast
Green Valley, IL

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Weather in August

The last month of the summer, August, is another warm month in Green Valley, Illinois, with an average temperature varying between 63.5°F (17.5°C) and 81.1°F (27.3°C).

Temperature

As July turns into August, the average high-temperatures rest at a still warm 81.1°F (27.3°C), showing a minor variation from the prior month. Throughout the month of August, Green Valley expects an average low of 63.5°F (17.5°C).

Heat index

The heat index for August is evaluated at a tropical 87.8°F (31°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', comes about by integrating the temperature readings with the humidity levels. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

In Green Valley, the average relative humidity in August is 82%.

Rainfall

In Green Valley, Illinois, in August, it is raining for 12.4 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, in Green Valley, there are 131.4 rainfall days, and 20.08" (510mm) of precipitation is accumulated.

Snowfall

In Green Valley, Illinois, snow does not fall in May through October.

Daylight

In August, the average length of the day is 13h and 44min.
On the first day of the month, sunrise is at 5:56 am and sunset at 8:12 pm. On the last day of August, sunrise is at 6:25 am and sunset at 7:31 pm CDT.

Sunshine

In Green Valley, the average sunshine in August is 9.8h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during August translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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Frequently asked questions

What are the temperatures in Green Valley in August?

In August, in Green Valley, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 63.5°F (17.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in August is evaluated at 87.8°F (31°C).

What is the average humidity in August in Green Valley?

In Green Valley, Illinois, the average relative humidity in August is 82%.

How many days does it rain in August in Green Valley?

In Green Valley, Illinois, in August, it is raining for 12.4 days, with typically 1.61" (41mm) of accumulated precipitation.

When it does not snow in Green Valley?

In Green Valley, Illinois, snow does not fall in May through October.

How many hours of daylight does Green Valley have in August?

The average day length in August in Green Valley, Illinois, is 13h and 44min.

What time are sunrise and sunset in August in Green Valley?

On the first day of August in Green Valley, Illinois, sunrise is at 5:56 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:31 pm CDT.

How many hours of sunshine does Green Valley have in August?

In August, the average sunshine duration in Green Valley, Illinois, is 9.8h.

What is the month with the highest UV index in Green Valley?

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

How high is the UV index in August in Green Valley?

In Green Valley, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to 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
Green Valley, IL

Average temperature in August - Green Valley, IL
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in August: 63.5°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in August
Green Valley, IL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in August
Green Valley, IL

Average wind speed in August - Green Valley, IL
  • Average wind speed in August: 6.4mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in August
Green Valley, IL

Average humidity in August - Green Valley, IL
  • Average humidity in August: 82%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Green Valley, IL

Average rainfall in August - Green Valley, IL
  • Average rainfall in August: 1.61"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is February (1.02").

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Average rainfall days in August
Green Valley, IL

Average rainfall days in August - Green Valley, IL
  • Average rainfall days in August: 12.4 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.1 days).

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Average snowfall in August
Green Valley, IL

Average snowfall in August - Green Valley, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Green Valley, IL

Average snowfall days in August - Green Valley, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Green Valley, IL

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in August
Green Valley, IL

Average sunshine days in August - Green Valley, IL
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.8 days).

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Average UV index in August
Green Valley, IL

Average UV index in August - Green Valley, 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, February, November and December (UV index 2).

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Average cloud cover in August
Green Valley, IL

Average cloud cover in August - Green Valley, IL
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in August
Green Valley, IL

Average visibility in August - Green Valley, IL
  • Average visibility in August: 5mi

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).

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Green Valley, Illinois, USA

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