July weather forecast
Justice, IL

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Weather in July

July, like June, in Justice, Illinois, is another warm summer month, with an average temperature ranging between min 66.6°F (19.2°C) and max 81.9°F (27.7°C).

Temperature

July is Justice's warmest month, registering average high temperatures of 81.9°F (27.7°C) and lows of 66.6°F (19.2°C).

Heat index

July's mean heat index is calculated to be a tropical 87.8°F (31°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.
Realize that the values for the heat index are set for shaded places and light winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.

Humidity

In Justice, the average relative humidity in July is 77%.

Rainfall

In July, in Justice, the rain falls for 18.7 days. Throughout July, 3.86" (98mm) of precipitation is accumulated. Throughout the year, in Justice, Illinois, there are 166.8 rainfall days, and 34.96" (888mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Justice, the average length of the day in July is 14h and 51min.
On the first day of July in Justice, sunrise is at 5:20 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:10 pm CDT.

Sunshine

The average sunshine in July is 10.1h.

UV index

July and August, with an average maximum UV index of 6, are months with the highest UV index in Justice. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In July, a regular UV index of 6 translates into these guidelines:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. 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

What is the warmest month in Justice?

Temperature records mark July as the warmest month, with highs averaging 81.9°F (27.7°C) and lows at 66.6°F (19.2°C).

What is the average July temperature in Justice?

July temperatures in Justice, Illinois, vary between a high-temperature of 81.9°F (27.7°C) and a low-temperature of 66.6°F (19.2°C). The average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, in July is calculated to be 87.8°F (31°C).

What is the average humidity in July in Justice?

The average relative humidity in July in Justice is 77%.

How many days does it rain in July in Justice?

In Justice, Illinois, in July, during 18.7 rainfall days, 3.86" (98mm) of precipitation is typically accumulated.

When it does not snow in Justice?

May through September are months without snowfall.

How many hours of daylight does Justice have in July?

In July, the average day length in Justice is 14h and 51min.

When are sunrise and sunset in July in Justice?

In July, on the first day of the month, sunrise is at 5:20 am and sunset at 8:29 pm. On the last day of the month, in Justice, sunrise is at 5:45 am and sunset at 8:10 pm CDT.

How long on average sun shines in July in Justice?

In July, the average sunshine duration is 10.1h.

When is the highest UV index in Justice?

The months with the highest UV index in Justice are July and August, with an average maximum UV index of 6.

How high is the UV index in July in Justice?

The average daily maximum UV index in July in Justice is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's 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 July
Justice, IL

Average temperature in July - Justice, IL
  • Average high temperature in July: 81.9°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in July: 66.6°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

Average pressure in July
Justice, IL

Average pressure in July - Justice, IL
  • Average pressure in July: 29.97"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in July
Justice, IL

Average wind speed in July - Justice, IL
  • Average wind speed in July: 6.4mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in July
Justice, IL

Average humidity in July - Justice, IL
  • Average humidity in July: 77%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

Average rainfall in July
Justice, IL

Average rainfall in July - Justice, IL
  • Average rainfall in July: 3.86"

The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are November and December (1.77").

Average rainfall days in July
Justice, IL

Average rainfall days in July - Justice, IL
  • Average rainfall days in July: 18.7 days

The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (5.9 days).

Average snowfall in July
Justice, IL

Average snowfall in July - Justice, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is February (5.28").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in July
Justice, IL

Average snowfall days in July - Justice, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in July /
Average sunshine in July
Justice, IL

Average daylight in July / Average sunshine in July - Justice, IL
  • Average daylight in July: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in July: 10h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in July
Justice, IL

Average sunshine days in July - Justice, IL
  • Average sunshine days in July: 8.8 days

The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is June (8.2 days).

Average UV index in July
Justice, IL

Average UV index in July - Justice, IL
  • Average UV index in July: 6

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

Average cloud cover in July
Justice, IL

Average cloud cover in July - Justice, IL
  • Average cloud cover in July: 31

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in July
Justice, IL

Average visibility in July - Justice, IL
  • Average visibility in July: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

Justice, Illinois, USA

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