August weather forecast
Perry, IL

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Weather in August

August, the last month of the summer in Perry, is another warm month, with an average temperature fluctuating between 83.5°F (28.6°C) and 65.5°F (18.6°C).

Temperature

With the transition into August, Perry notes an average high-temperature of a still warm 83.5°F (28.6°C), closely resembling July. Throughout August, Perry encounters an average temperature drop to a refreshing 65.5°F (18.6°C).

Heat index

August's mean heat index is estimated at a tropical 91.4°F (33°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Research indicates the heat index considers values in shaded locales and with light winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', quantifies the warmth felt when relative humidity is considered. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for 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 August, the average relative humidity is 78%.

Rainfall

In Perry, in August, it is raining for 12.4 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 128.8 rainfall days, and 18.35" (466mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

In Perry, the average length of the day in August is 13h and 41min.
On the first day of the month, sunrise is at 6:02 am and sunset at 8:15 pm. On the last day of August, sunrise is at 6:30 am and sunset at 7:35 pm CDT.

Sunshine

In August, the average sunshine is 10h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Perry. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index, 6 during August, leads to the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is August?

In Perry, in August, the average high-temperature is 83.5°F (28.6°C), and the average low-temperature is 65.5°F (18.6°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is estimated at 91.4°F (33°C).

What is the average humidity in August?

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

How much does it rain in August?

In August, the rain falls for 12.4 days. Throughout August, 1.85" (47mm) of precipitation is accumulated.

When it does not snow in Perry?

In Perry, snow does not fall in May through October.

What is the average length of the day in August?

The average day length in August in Perry is 13h and 41min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 6:02 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:35 pm CDT.

How long on average sun shines in August?

In August, the average sunshine duration is 10h.

When is the highest UV index?

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

What is the UV index intensity in August?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk 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
Perry, IL

Average temperature in August - Perry, IL
  • Average high temperature in August: 83.5°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 (33.8°F).

  • Average low temperature in August: 65.5°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 (21.6°F).

Average pressure in August
Perry, IL

Average pressure in August - Perry, 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).

Average wind speed in August
Perry, IL

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

The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (6mph).

Average humidity in August
Perry, IL

Average humidity in August - Perry, 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%).

Average rainfall in August
Perry, IL

Average rainfall in August - Perry, IL
  • Average rainfall in August: 1.85"

The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is February (0.75").

Average rainfall days in August
Perry, IL

Average rainfall days in August - Perry, IL
  • Average rainfall days in August: 12.4 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.5 days).

Average snowfall in August
Perry, IL

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

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Perry, IL

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

The month with the highest number of snowfall days is January (6.3 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
Perry, IL

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

The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in August
Perry, IL

Average sunshine days in August - Perry, IL
  • Average sunshine days in August: 16.4 days

The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is June (12.3 days).

Average UV index in August
Perry, IL

Average UV index in August - Perry, 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
Perry, IL

Average cloud cover in August - Perry, 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
Perry, IL

Average visibility in August - Perry, 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).

Perry, Illinois, USA

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