August weather forecast
Chillicothe, IL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Chillicothe, Illinois, with an average temperature ranging between min 63°F (17.2°C) and max 80.4°F (26.9°C).

Temperature

Chillicothe experiences a transition to a still moderately hot 80.4°F (26.9°C) in average high-temperatures with the arrival of August, not greatly differing from July's 81.9°F (27.7°C). An average minimum temperature of 63°F (17.2°C) marks the month of August in Chillicothe.

Humidity

The average relative humidity in August is 82%.

Rainfall

In August, the rain falls for 11.9 days. Throughout August, 1.26" (32mm) of precipitation is accumulated. Throughout the year, there are 123.4 rainfall days, and 15.12" (384mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Chillicothe.

Daylight

In Chillicothe, the average length of the day in August is 13h and 46min.
On the first day of the month, sunrise is at 5:54 am and sunset at 8:13 pm. On the last day of August, in Chillicothe, sunrise is at 6:24 am and sunset at 7:31 pm CDT.

Sunshine

In August, the average sunshine in Chillicothe is 9.8h.

UV index

The average daily maximum UV index in August in Chillicothe is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 5 during August leads to these advisories:
Guard yourself - Avoiding sunburn is suggested. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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Frequently asked questions

What is the temperature in August in Chillicothe?

The high-temperature during August is 80.4°F (26.9°C) and the low-temperature is 63°F (17.2°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, is computed to be 89.6°F (32°C).

What is the average humidity in August in Chillicothe?

The average relative humidity in August in Chillicothe is 82%.

How much does it rain in Chillicothe in August?

In Chillicothe, Illinois, in August, during 11.9 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.

When it does not snow in Chillicothe?

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

How many hours of daylight does Chillicothe have in August?

The average day length in August in Chillicothe, Illinois, is 13h and 46min.

What time are sunrise and sunset in August in Chillicothe?

In August, on the first day of the month, sunrise is at 5:54 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:31 pm CDT.

How many hours of sunshine does Chillicothe have in August?

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

What is the UV index intensity in August in Chillicothe?

The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate 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
Chillicothe, IL

Average temperature in August - Chillicothe, IL
  • Average high temperature in August: 80.4°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 (29.8°F).

  • Average low temperature in August: 63°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).

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Average pressure in August
Chillicothe, IL

Average pressure in August - Chillicothe, IL
  • Average pressure in August: 29.97"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
Chillicothe, IL

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

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average humidity in August
Chillicothe, IL

Average humidity in August - Chillicothe, 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 (72%).

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Average rainfall in August
Chillicothe, IL

Average rainfall in August - Chillicothe, IL
  • Average rainfall in August: 1.26"

The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days in August
Chillicothe, IL

Average rainfall days in August - Chillicothe, IL
  • Average rainfall days in August: 11.9 days

The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is February (4.5 days).

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Average snowfall in August
Chillicothe, IL

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

The month with the highest snowfall is January (1.93").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Chillicothe, IL

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

The month with the highest number of snowfall days is January (9.2 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
Chillicothe, IL

Average daylight in August / Average sunshine in August - Chillicothe, IL
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
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 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in August
Chillicothe, IL

Average sunshine days in August - Chillicothe, IL
  • Average sunshine days in August: 16.5 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (12.4 days).

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Average UV index in August
Chillicothe, IL

Average UV index in August - Chillicothe, IL
  • Average UV index in August: 5

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in August
Chillicothe, IL

Average cloud cover in August - Chillicothe, 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
Chillicothe, IL

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

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