July weather forecast
Champaign, IL

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An old building that works as an auditorium within the University of Illinois in Champaign
An old building that works as an auditorium within the University of Illinois in Champaign

Weather in July

In July, Champaign enjoys the pinnacle of its summer with persistent warmth and the mercury hovering at an average high of 81.1°F (27.3°C). This month manifests the highest levels of humidity seen all year, marking it at 85%. Remarkably, despite the soaring temperatures and high humidity, July observes a slight decrease in rainfall compared to June. Additionally, the continued absence of snow, extended daylight duration, and abundant sunshine further enhance the summer feel. The wind speed, on the contrary, records the lowest average of the year.

Temperature

July, on average, is the warmest month in Champaign, registering a high temperature of 81.1°F (27.3°C) and a low of 65.1°F (18.4°C).

Heat index

The heat index in July is estimated at a hot 87.8°F (31°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

July is the most humid month, with an average relative humidity of 85%.

Rainfall

In Champaign, during July, the rain falls for 14.7 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, there are 129.9 rainfall days, and 18.15" (461mm) of precipitation is accumulated.

Snowfall

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

Daylight

In July, the average length of the day is 14h and 41min.
On the first day of the month, sunrise is at 5:27 am and sunset at 8:26 pm. On the last day of July, in Champaign, sunrise is at 5:50 am and sunset at 8:07 pm CDT.

Sunshine

In Champaign, the average sunshine in July is 9.9h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 6 during July translates into the following guidance:
Deflect overexposure. Sun protection is a necessity. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

What time of the year is the hottest in Champaign?

In Champaign, July is the month with the highest recorded average temperatures, measuring a high of 81.1°F (27.3°C) and a low of 65.1°F (18.4°C).

What are July temperatures in Champaign?

The average high-temperature, in July, in Champaign, is 81.1°F (27.3°C), while the average low-temperature is 65.1°F (18.4°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is estimated at 87.8°F (31°C).

What is the most humid month in Champaign?

With an average relative humidity of 85%, July is the most humid month in Champaign, Illinois.

What is the average humidity in July in Champaign?

In Champaign, Illinois, the average relative humidity in July is 85%.

How many days does it rain in July in Champaign?

In Champaign, Illinois, in July, during 14.7 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

When it does not snow in Champaign?

May through October are months without snowfall.

What is the average length of the day in July in Champaign?

In July, the average day length in Champaign, Illinois, is 14h and 41min.

When are sunrise and sunset in July in Champaign?

In July, on the first day of the month, sunrise is at 5:27 am and sunset at 8:26 pm. On the last day of the month, in Champaign, sunrise is at 5:50 am and sunset at 8:07 pm CDT.

How long on average sun shines in July in Champaign?

The average sunshine duration in July in Champaign is 9.9h.

When is the highest UV index in Champaign?

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

What is the UV index intensity in July in Champaign?

In Champaign, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health threat 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
Champaign, IL

Average temperature in July - Champaign, IL
  • Average high temperature in July: 81.1°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in July: 65.1°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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Average pressure in July
Champaign, IL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in July
Champaign, IL

Average wind speed in July - Champaign, IL
  • Average wind speed in July: 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 (6.3mph).

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Average humidity in July
Champaign, IL

Average humidity in July - Champaign, IL
  • Average humidity in July: 85%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in July
Champaign, IL

Average rainfall in July - Champaign, IL
  • Average rainfall in July: 1.69"

The wettest month (with the highest rainfall) is April (2.24").
The driest month (with the least rainfall) is September (0.94").

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Average rainfall days in July
Champaign, IL

Average rainfall days in July - Champaign, IL
  • Average rainfall days in July: 14.7 days

The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (6 days).

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Average snowfall in July
Champaign, IL

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

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in July
Champaign, IL

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

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Champaign, IL
  • Average daylight in July: 14h 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 24min).

  • Average sunshine in July: 9h and 5min

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 0min).

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Average sunshine days in July
Champaign, IL

Average sunshine days in July - Champaign, IL
  • Average sunshine days in July: 11.8 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in July
Champaign, IL

Average UV index in July - Champaign, IL
  • Average UV index in July: 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).

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Average cloud cover in July
Champaign, IL

Average cloud cover in July - Champaign, IL
  • Average cloud cover in July: 33

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in July
Champaign, IL

Average visibility in July - Champaign, IL
  • Average visibility in July: 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).

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Champaign, Illinois, USA

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