August weather forecast
Thayer, IL

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Weather in August

The last month of the summer, August, is another warm month in Thayer, Illinois, with an average temperature varying between 82°F (27.8°C) and 64.8°F (18.2°C).

Temperature

Thayer's weather, upon August's arrival, documents an average high-temperature of a still warm 82°F (27.8°C), nearly identical to the prior month. In Thayer, in August, the average low-temperature is an enjoyable 64.8°F (18.2°C).

Heat index

August's heat index is estimated at a tropical 89.6°F (32°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. 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 quite important for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.

Humidity

In Thayer, the average relative humidity in August is 81%.

Rainfall

In Thayer, during August, the rain falls for 15.3 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, there are 143.6 rainfall days, and 23.74" (603mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Thayer, Illinois.

Daylight

In Thayer, Illinois, the average length of the day in August is 13h and 40min.
On the first day of the month, sunrise is at 5:59 am and sunset at 8:11 pm. On the last day of August, sunrise is at 6:27 am and sunset at 7:31 pm CDT.

Sunshine

The average sunshine in August in Thayer is 9.7h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 6 in August translates into this advice:
Guard oneself from overexposure. Defence against sun injury is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Thayer in August?

An average high-temperature, in August, in Thayer, is 82°F (27.8°C) and the average low-temperature is 64.8°F (18.2°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 89.6°F (32°C).

What is the average humidity in August in Thayer?

In Thayer, Illinois, the average relative humidity in August is 81%.

How much does it rain in Thayer in August?

In Thayer, Illinois, in August, during 15.3 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

When it does not snow in Thayer?

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

How many hours of daylight does Thayer have in August?

In Thayer, the average day length in August is 13h and 40min.

What time are sunrise and sunset in August in Thayer?

In August, on the first day of the month, sunrise is at 5:59 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:31 pm CDT.

How many hours of sunshine does Thayer have in August?

The average sunshine duration in August in Thayer, Illinois, is 9.7h.

What are the months with the highest UV index in Thayer?

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

What is the UV index reading in August in Thayer?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability 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
Thayer, IL

Average temperature in August - Thayer, IL
  • Average high temperature in August: 82°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in August: 64.8°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

Average pressure in August
Thayer, IL

Average pressure in August - Thayer, 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 (29.92"Hg).

Average wind speed in August
Thayer, IL

Average wind speed in August - Thayer, IL
  • Average wind speed in August: 6.2mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).

Average humidity in August
Thayer, IL

Average humidity in August - Thayer, IL
  • Average humidity in August: 81%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Thayer, IL

Average rainfall in August - Thayer, IL
  • Average rainfall in August: 2.28"

The wettest month (with the highest rainfall) is June (2.83").
The driest months (with the least rainfall) are February and December (1.26").

Average rainfall days in August
Thayer, IL

Average rainfall days in August - Thayer, IL
  • Average rainfall days in August: 15.3 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (6.4 days).

Average snowfall in August
Thayer, IL

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

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

Average snowfall days in August
Thayer, IL

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

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

Average daylight in August / Average sunshine in August - Thayer, 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 24min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in August
Thayer, IL

Average sunshine days in August - Thayer, IL
  • Average sunshine days in August: 13.1 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (11.5 days).

Average UV index in August
Thayer, IL

Average UV index in August - Thayer, 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
Thayer, IL

Average cloud cover in August - Thayer, IL
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in August
Thayer, IL

Average visibility in August - Thayer, 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).

Thayer, Illinois, USA

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