August weather forecast
Columbus, IL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Columbus, Illinois, with an average temperature fluctuating between 64.9°F (18.3°C) and 82.9°F (28.3°C).

Temperature

The shift from July to August is characterized by an average high-temperature of a still moderately hot 82.9°F (28.3°C), not significantly different from the 83.8°F (28.8°C) of July. Columbus observes an average low-temperature of 64.9°F (18.3°C) during August.

Heat index

The heat index in August is appraised at a hot 91.4°F (33°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

In Columbus, the average relative humidity in August is 78%.

Rainfall

In Columbus, Illinois, in August, it is raining for 13 days, with typically 2.01" (51mm) of accumulated precipitation. Throughout the year, there are 134.2 rainfall days, and 23.15" (588mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Columbus, the average length of the day in August is 13h and 42min.
On the first day of the month, sunrise is at 6:03 am and sunset at 8:18 pm. On the last day of August, sunrise is at 6:32 am and sunset at 7:37 pm CDT.

Sunshine

The average sunshine in August in Columbus, Illinois, is 10h.

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 exposure to the Sun's UV rays for average individuals.
Note: In August, the maximum UV index of 6 transforms into these recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun 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 it in Columbus in August?

Columbus in August has an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 64.9°F (18.3°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is appraised at 91.4°F (33°C).

What is the average humidity in August in Columbus?

The average relative humidity in August is 78%.

How many days does it rain in August in Columbus?

In Columbus, in August, it is raining for 13 days, with typically 2.01" (51mm) of accumulated precipitation.

When it does not snow in Columbus?

In Columbus, Illinois, snow does not fall in May through September.

How many hours of daylight does Columbus have in August?

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

When is the sunrise / sunset in August in Columbus?

On the first day of August in Columbus, Illinois, sunrise is at 6:03 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 7:37 pm CDT.

How long on average sun shines in August in Columbus?

In Columbus, the average sunshine duration in August is 10h.

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

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

What is the UV index intensity in August in Columbus?

In August, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health threat from exposure to the Sun's 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
Columbus, IL

Average temperature in August - Columbus, IL
  • Average high temperature in August: 82.9°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (32.7°F).

  • Average low temperature in August: 64.9°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 (20.1°F).

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Average pressure in August
Columbus, IL

Average pressure in August - Columbus, IL
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in August
Columbus, IL

Average wind speed in August - Columbus, IL
  • Average wind speed in August: 6.5mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

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Average humidity in August
Columbus, IL

Average humidity in August - Columbus, IL
  • Average humidity in August: 78%

The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Columbus, IL

Average rainfall in August - Columbus, IL
  • Average rainfall in August: 2.01"

The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are January and December (1.02").

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Average rainfall days in August
Columbus, IL

Average rainfall days in August - Columbus, IL
  • Average rainfall days in August: 13 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (5 days).

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Average snowfall in August
Columbus, IL

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

The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Columbus, IL

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

The month with the highest number of snowfall days is January (8.8 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
Columbus, IL

Average daylight in August / Average sunshine in August - Columbus, 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: 10h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days in August
Columbus, IL

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

The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is June (11.1 days).

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Average UV index in August
Columbus, IL

Average UV index in August - Columbus, 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
Columbus, IL

Average cloud cover in August - Columbus, IL
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in August
Columbus, IL

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

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