August weather forecast
Forsyth, IL

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Weather in August

August, the last month of the summer in Forsyth, is another warm month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 63.7°F (17.6°C).

Temperature

Forsyth's shift into August is marked by a subtle change to a still moderately hot 81.1°F (27.3°C) from July's 81.9°F (27.7°C) in temperature. Forsyth throughout August, experiences an average nighttime temperature of 63.7°F (17.6°C).

Heat index

For August, the heat index is evaluated at a hot 87.8°F (31°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

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

Rainfall

In Forsyth, during August, the rain falls for 13.9 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Forsyth, Illinois, during the entire year, the rain falls for 139.9 days and collects up to 20.91" (531mm) of precipitation.

Snowfall

In Forsyth, snow does not fall in May through October.

Daylight

In August, the average length of the day is 13h and 42min.
On the first day of August in Forsyth, sunrise is at 5:55 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:28 pm CDT.

Sunshine

The average sunshine in August in Forsyth, Illinois, is 9.7h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In August, the maximum UV index of 6 suggests this advice:
Deter overexposure. Protecting against the sun's effects is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What is the temperature in August in Forsyth?

August temperatures in Forsyth, Illinois, vary between a high-temperature of 81.1°F (27.3°C) and a low-temperature of 63.7°F (17.6°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 87.8°F (31°C).

What is the average humidity in August in Forsyth?

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

How many days does it rain in August in Forsyth?

In Forsyth, during August, the rain falls for 13.9 days and regularly aggregates up to 2.05" (52mm) of precipitation.

When it does not snow in Forsyth?

May through October are months without snowfall.

How many hours of daylight does Forsyth have in August?

In Forsyth, Illinois, the average day length in August is 13h and 42min.

When are sunrise and sunset in August in Forsyth?

In August, on the first day of the month, sunrise is at 5:55 am and sunset at 8:09 pm. On the last day of the month, in Forsyth, sunrise is at 6:23 am and sunset at 7:28 pm CDT.

How many hours of sunshine does Forsyth have in August?

In Forsyth, Illinois, the average sunshine duration in August is 9.7h.

What are the months with the highest UV index in Forsyth?

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

How high is the UV index in August in Forsyth?

In Forsyth, the average daily maximum UV index in August is 6. A UV Index reading 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
Forsyth, IL

Average temperature in August - Forsyth, IL
  • Average high temperature in August: 81.1°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 (32.4°F).

  • Average low temperature in August: 63.7°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 (20.1°F).

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Average pressure in August
Forsyth, IL

Average pressure in August - Forsyth, 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 (29.92"Hg).

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Average wind speed in August
Forsyth, IL

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

The windiest months (with the highest average wind speed) are January, February and April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in August
Forsyth, IL

Average humidity in August - Forsyth, 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 (70%).

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Average rainfall in August
Forsyth, IL

Average rainfall in August - Forsyth, IL
  • Average rainfall in August: 2.05"

The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is December (1.06").

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Average rainfall days in August
Forsyth, IL

Average rainfall days in August - Forsyth, IL
  • Average rainfall days in August: 13.9 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (6.2 days).

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Average snowfall in August
Forsyth, IL

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

The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Forsyth, IL

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

The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July and August (0 days).

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

Average daylight in August / Average sunshine in August - Forsyth, 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 24min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in August
Forsyth, IL

Average sunshine days in August - Forsyth, IL
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is July (10.3 days).

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Average UV index in August
Forsyth, IL

Average UV index in August - Forsyth, 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
Forsyth, IL

Average cloud cover in August - Forsyth, IL
  • Average cloud cover in August: 32

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).

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Average visibility in August
Forsyth, IL

Average visibility in August - Forsyth, 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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Forsyth, Illinois, USA

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