August weather forecast
Smithboro, IL

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Weather in August

August, the last month of the summer in Smithboro, is another warm month, with an average temperature fluctuating between 82.9°F (28.3°C) and 65.1°F (18.4°C).

Temperature

August denotes a minimal variation in the average high-temperature to a still moderately hot 82.9°F (28.3°C) from July's 84.4°F (29.1°C). Throughout the month of August, Smithboro witnesses an average temperature of 65.1°F (18.4°C).

Heat index

The average heat index in August is appraised at a hot 91.4°F (33°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

In August, the average relative humidity is 80%.

Rainfall

In Smithboro, during August, the rain falls for 12.2 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Smithboro, Illinois, during the entire year, the rain falls for 137.9 days and collects up to 24.88" (632mm) of precipitation.

Snowfall

April through October are months without snowfall in Smithboro, Illinois.

Daylight

In Smithboro, the average length of the day in August is 13h and 38min.
On the first day of August, sunrise is at 5:59 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:28 pm CDT.

Sunshine

In Smithboro, the average sunshine in August is 10h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Smithboro. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In August, an average UV index of 6 transforms into the following instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in Smithboro in August?

The high-temperature, in August, in Smithboro, is 82.9°F (28.3°C), while the low-temperature averages to 65.1°F (18.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, is appraised at 91.4°F (33°C).

What is the average humidity in August in Smithboro?

In Smithboro, Illinois, the average relative humidity in August is 80%.

How many days does it rain in August in Smithboro?

In Smithboro, Illinois, during August, the rain falls for 12.2 days and regularly aggregates up to 2.52" (64mm) of precipitation.

When it does not snow in Smithboro?

In Smithboro, Illinois, snow does not fall in April through October.

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

In August, the average day length is 13h and 38min.

When are sunrise and sunset in August in Smithboro?

On the first day of August, sunrise is at 5:59 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:28 pm CDT.

How many hours of sunshine does Smithboro have in August?

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

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

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

How high is the UV index in August in Smithboro?

In Smithboro, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health risk from 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
Smithboro, IL

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

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in August: 65.1°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in August
Smithboro, IL

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in August
Smithboro, IL

Average wind speed in August - Smithboro, IL
  • Average wind speed in August: 5.9mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).

Average humidity in August
Smithboro, IL

Average humidity in August - Smithboro, IL
  • Average humidity in August: 80%

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

Average rainfall in August
Smithboro, IL

Average rainfall in August - Smithboro, IL
  • Average rainfall in August: 2.52"

The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is February (1.26").

Average rainfall days in August
Smithboro, IL

Average rainfall days in August - Smithboro, IL
  • Average rainfall days in August: 12.2 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in August
Smithboro, IL

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

The month with the highest snowfall is December (1.89").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Smithboro, IL

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

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).

Average sunshine days in August
Smithboro, IL

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

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

Average UV index in August
Smithboro, IL

Average UV index in August - Smithboro, 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).

Average cloud cover in August
Smithboro, IL

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

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).

Average visibility in August
Smithboro, IL

Average visibility in August - Smithboro, 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).

Smithboro, Illinois, USA

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