August weather forecast
Troy, IL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Troy, Illinois, with temperature in the range of an average high of 84°F (28.9°C) and an average low of 66°F (18.9°C).

Temperature

The advent of August presents an average high-temperature of a still warm 84°F (28.9°C), maintaining a close correlation with the preceding month. Troy, during the month of August, experiences an average low-temperature of 66°F (18.9°C).

Heat index

The average heat index in August is appraised at a tropical 93.2°F (34°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

May, July and August, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Troy, during August, the rain falls for 13.1 days and regularly aggregates up to 3.35" (85mm) of precipitation. Throughout the year, there are 149.9 rainfall days, and 33.94" (862mm) of precipitation is accumulated.

Snowfall

April through August and October are months without snowfall.

Daylight

In Troy, the average length of the day in August is 13h and 38min.
On the first day of August, sunrise is at 6:01 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:30 pm CDT.

Sunshine

In August, the average sunshine is 10.1h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 6 in August translates into this advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Aug 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in Troy in August?

August temperatures vary between a high-temperature of 84°F (28.9°C) and a low-temperature of 66°F (18.9°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 93.2°F (34°C).

What is the most humid month in Troy?

The months with the highest humidity in Troy are May, July and August, with an average relative humidity of 79%.

What is the average humidity in August?

In August, the average relative humidity is 79%.

How much does it rain in August?

In August, the rain falls for 13.1 days. Throughout August, 3.35" (85mm) of precipitation is accumulated.

When it does not snow in Troy?

In Troy, snow does not fall in April through August and October.

Does it snow in August?

In Troy, Illinois, in August, it doesn't snow. In September, it regularly snows.

How many hours of daylight does Troy have in August?

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

When are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:01 am and sunset at 8:10 pm. On the last day of the month, in Troy, Illinois, sunrise is at 6:28 am and sunset at 7:30 pm CDT.

How many hours of sunshine does Troy have in August?

In Troy, the average sunshine duration in August is 10.1h.

What are the months with the highest UV index?

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

What is the UV index reading in August?

In Troy, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes 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
Troy, IL

Average temperature in August - Troy, IL
  • Average high temperature in August: 84°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in August: 66°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in August
Troy, IL

Average pressure in August - Troy, 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
Troy, IL

Average wind speed in August - Troy, IL
  • Average wind speed in August: 5.7mph

The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).

Average humidity in August
Troy, IL

Average humidity in August - Troy, IL
  • Average humidity in August: 79%

The months with the highest relative humidity are May, July and August (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Troy, IL

Average rainfall in August - Troy, IL
  • Average rainfall in August: 3.35"

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (1.77").

Average rainfall days in August
Troy, IL

Average rainfall days in August - Troy, IL
  • Average rainfall days in August: 13.1 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in August
Troy, IL

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

The month with the highest snowfall is January (2.13").
The months with the least snowfall are April, May, June, July, August and October (0").

Average snowfall days in August
Troy, IL

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

The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are May, June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 1min

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

Average sunshine days in August
Troy, IL

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

The month with the most sunshine days is December (18.6 days).
The month with the least sunshine days is May (11.6 days).

Average UV index in August
Troy, IL

Average UV index in August - Troy, IL
  • Average UV index in August: 6

The months with the highest UV index are May, 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
Troy, IL

Average cloud cover in August - Troy, IL
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 28).

Average visibility in August
Troy, IL

Average visibility in August - Troy, 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).

Troy, Illinois, USA

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