August weather forecast
Junction, IL

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Weather in August

The last month of the summer, August, is another warm month in Junction, Illinois, with an average temperature varying between 84.9°F (29.4°C) and 66.2°F (19°C).

Temperature

Junction experiences a recorded average high-temperature of a warm 84.9°F (29.4°C) in August, closely aligned with July's 86.2°F (30.1°C). Throughout August, the temperature in Junction tends to fall to a consistent average low of 66.2°F (19°C).

Heat index

In August, the heat index is appraised at a sweltering 95°F (35°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Junction, Illinois, the average relative humidity in August is 77%.

Rainfall

In Junction, in August, during 13.3 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Junction, during the entire year, the rain falls for 146.3 days and collects up to 24.96" (634mm) of precipitation.

Snowfall

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

Daylight

In August, the average length of the day in Junction is 13h and 34min.
On the first day of August, sunrise is at 5:57 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:23 pm CDT.

Sunshine

In August, the average sunshine is 10.4h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 6 in August interprets into the following advice:
Shun overexposure. Protection from sun ravages is indispensable. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
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Frequently asked questions

How hot is August in Junction?

The high-temperature during August is 84.9°F (29.4°C) and the low-temperature is 66.2°F (19°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is appraised at 95°F (35°C).

What is the average humidity in August in Junction?

The average relative humidity in August in Junction is 77%.

How much does it rain in Junction in August?

In Junction, in August, during 13.3 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

When it does not snow in Junction?

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

What is the average length of the day in August in Junction?

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

When is the sunrise / sunset in August in Junction?

In August, on the first day of the month, sunrise is at 5:57 am and sunset at 8:01 pm. On the last day of the month, in Junction, sunrise is at 6:22 am and sunset at 7:23 pm CDT.

How long on average sun shines in August in Junction?

The average sunshine duration in August in Junction, Illinois, is 10.4h.

What is the month with the highest UV index in Junction?

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

What is the UV index intensity in August in Junction?

In Junction, 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
Junction, IL

Average temperature in August - Junction, IL
  • Average high temperature in August: 84.9°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in August: 66.2°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

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Average pressure in August
Junction, IL

Average pressure in August - Junction, IL
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in August
Junction, IL

Average wind speed in August - Junction, IL
  • Average wind speed in August: 5.8mph

The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in August
Junction, IL

Average humidity in August - Junction, IL
  • Average humidity in August: 77%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in August
Junction, IL

Average rainfall in August - Junction, IL
  • Average rainfall in August: 1.77"

The wettest month (with the highest rainfall) is April (3.27").
The driest month (with the least rainfall) is September (1.14").

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Average rainfall days in August
Junction, IL

Average rainfall days in August - Junction, IL
  • Average rainfall days in August: 13.3 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).

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Average snowfall in August
Junction, IL

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

The month with the highest snowfall is February (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Junction, IL

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

The month with the highest number of snowfall days is January (4.8 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
Junction, IL

Average daylight in August / Average sunshine in August - Junction, 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 month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

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Average sunshine days in August
Junction, IL

Average sunshine days in August - Junction, IL
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).

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Average UV index in August
Junction, IL

Average UV index in August - Junction, 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).

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Average cloud cover in August
Junction, IL

Average cloud cover in August - Junction, IL
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).

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Average visibility in August
Junction, IL

Average visibility in August - Junction, 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).

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Junction, Illinois, USA

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