July weather forecast
Grand Chain, IL

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Weather in July

July in Grand Chain, Illinois, is a tropical summer month, with temperature in the range of an average high of 88°F (31.1°C) and an average low of 68.5°F (20.3°C).

Temperature

The warmest time of the year is July, with temperatures averaging a high of 88°F (31.1°C) and a low of 68.5°F (20.3°C).

Heat index

During July, the heat index is appraised at a blisteringly hot 104°F (40°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In July, the average relative humidity is 76%.

Rainfall

In Grand Chain, during July, the rain falls for 13.1 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, there are 118.3 rainfall days, and 13.03" (331mm) of precipitation is accumulated.

Snowfall

In Grand Chain, Illinois, snow does not fall in April through October.

Daylight

The average length of the day in July is 14h and 26min.
On the first day of July, sunrise is at 5:39 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 8:04 pm CDT.

Sunshine

The months with the most sunshine are June and July, with an average of 10.4h of sunshine.

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 threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In July, a regular UV index of 6 translates into these guidelines:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.

Frequently asked questions

What is the warmest month?

The month of July sees the average highest temperatures in Grand Chain, reaching 88°F (31.1°C) at the peak and 68.5°F (20.3°C) at the low.

How hot is it in Grand Chain in July?

The high-temperature, in July, in Grand Chain, records 88°F (31.1°C), while the low-temperature is 68.5°F (20.3°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 104°F (40°C).

What is the average humidity in July?

In Grand Chain, the average relative humidity in July is 76%.

How much does it rain in July?

In July, the rain falls for 13.1 days. Throughout July, 1.42" (36mm) of precipitation is accumulated.

When it does not snow?

April through October are months without snowfall in Grand Chain, Illinois.

What is the average length of the day in July?

In July, the average day length in Grand Chain is 14h and 26min.

What time are sunrise and sunset in July?

On the first day of July, sunrise is at 5:39 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 8:04 pm CDT.

What are the months with the most sunshine in Grand Chain?

The months with the most sunshine in Grand Chain are June and July, with an average of 10.4h of sunshine.

How long on average sun shines in July in Grand Chain?

In Grand Chain, Illinois, the average sunshine duration in July is 10.4h.

What is the month with the highest UV index?

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

How high is the UV index in July?

The average daily maximum UV index in July is 6. A UV Index reading of 6 to 7 represents a high hazard to health 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 July
Grand Chain, IL

Average temperature in July - Grand Chain, IL
  • Average high temperature in July: 88°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in July: 68.5°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).

Average pressure in July
Grand Chain, IL

Average pressure in July - Grand Chain, IL
  • Average pressure in July: 29.98"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in July
Grand Chain, IL

Average wind speed in July - Grand Chain, IL
  • Average wind speed in July: 5.7mph

The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in July
Grand Chain, IL

Average humidity in July - Grand Chain, IL
  • Average humidity in July: 76%

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

Average rainfall in July
Grand Chain, IL

Average rainfall in July - Grand Chain, IL
  • Average rainfall in July: 1.42"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").

Average rainfall days in July
Grand Chain, IL

Average rainfall days in July - Grand Chain, IL
  • Average rainfall days in July: 13.1 days

The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).

Average snowfall in July
Grand Chain, IL

Average snowfall in July - Grand Chain, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in July
Grand Chain, IL

Average snowfall days in July - Grand Chain, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (3.3 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
Grand Chain, IL

Average daylight in July / Average sunshine in July - Grand Chain, IL
  • Average daylight in July: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in July: 10h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

Average sunshine days in July
Grand Chain, IL

Average sunshine days in July - Grand Chain, IL
  • Average sunshine days in July: 15.1 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).

Average UV index in July
Grand Chain, IL

Average UV index in July - Grand Chain, IL
  • Average UV index in July: 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 and December (UV index 2).

Average cloud cover in July
Grand Chain, IL

Average cloud cover in July - Grand Chain, IL
  • Average cloud cover in July: 30

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

Average visibility in July
Grand Chain, IL

Average visibility in July - Grand Chain, IL
  • Average visibility in July: 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).

Grand Chain, Illinois, USA

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