August weather forecast
Fairbury, IL

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Weather in August

August, the last month of the summer in Fairbury, is another warm month, with an average temperature fluctuating between 62.6°F (17°C) and 79.7°F (26.5°C).

Temperature

Fairbury's weather in August displays an average high-temperature of a still warm 79.7°F (26.5°C), showing minor disparity from July's 80.8°F (27.1°C). In Fairbury, the average temperature during the nights of August drops to a comfortable 62.6°F (17°C).

Humidity

In August, the average relative humidity is 83%.

Rainfall

In Fairbury, in August, during 13.3 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, there are 130.5 rainfall days, and 17.44" (443mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in August is 13h and 45min.
On the first day of August, sunrise is at 5:51 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:27 pm CDT.

Sunshine

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

UV index

In August, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 in August transforms into the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Updated: Aug 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Fairbury in August?

The average high-temperature, in August, in Fairbury, is 79.7°F (26.5°C), while the average low-temperature is 62.6°F (17°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in July is estimated at 87.8°F (31°C).

What is the average humidity in August?

The average relative humidity in August is 83%.

How many days does it rain in August in Fairbury?

In August, the rain falls for 13.3 days. Throughout August, 1.5" (38mm) of precipitation is accumulated.

When it does not snow?

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

How many hours of daylight does Fairbury have in August?

In Fairbury, the average day length in August is 13h and 45min.

What time are sunrise and sunset in August in Fairbury?

In August, on the first day of the month, sunrise is at 5:51 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:27 pm CDT.

How many hours of sunshine does Fairbury have in August?

In August, the average sunshine duration is 9.8h.

What is the UV index intensity in August?

In Fairbury, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to 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
Fairbury, IL

Average temperature in August - Fairbury, IL
  • Average high temperature in August: 79.7°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in August: 62.6°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in August
Fairbury, IL

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

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in August
Fairbury, IL

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

The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in August
Fairbury, IL

Average humidity in August - Fairbury, IL
  • Average humidity in August: 83%

The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Fairbury, IL

Average rainfall in August - Fairbury, IL
  • Average rainfall in August: 1.5"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is January (0.79").

Average rainfall days in August
Fairbury, IL

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

The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and February (5 days).

Average snowfall in August
Fairbury, IL

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

The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Fairbury, IL

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

The month with the highest number of snowfall days is January (10.6 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
Fairbury, IL

Average daylight in August / Average sunshine in August - Fairbury, 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 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in August
Fairbury, IL

Average sunshine days in August - Fairbury, IL
  • Average sunshine days in August: 13.5 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.4 days).

Average UV index in August
Fairbury, IL

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

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

Average cloud cover in August
Fairbury, IL

Average cloud cover in August - Fairbury, IL
  • Average cloud cover in August: 33

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).

Average visibility in August
Fairbury, IL

Average visibility in August - Fairbury, 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).

Fairbury, Illinois, USA

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