July weather forecast
Fayetteville, IL

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Weather in July

July is a tropical summer month in Fayetteville, Illinois, with an average temperature varying between 68.5°F (20.3°C) and 86.5°F (30.3°C).

Temperature

Temperature records mark July as the warmest month, with highs averaging 86.5°F (30.3°C) and lows at 68.5°F (20.3°C).

Heat index

The heat index for July is calculated to be a fiery hot 100.4°F (38°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Fayetteville, Illinois, the average relative humidity in July is 78%.

Rainfall

In July, in Fayetteville, Illinois, the rain falls for 15.1 days. Throughout July, 2.13" (54mm) of precipitation is accumulated. Throughout the year, there are 129.8 rainfall days, and 19.13" (486mm) of precipitation is accumulated.

Snowfall

In Fayetteville, Illinois, snow does not fall in April through August.

Daylight

In July, the average length of the day in Fayetteville, Illinois, is 14h and 32min.
On the first day of the month, sunrise is at 5:39 am and sunset at 8:26 pm. On the last day of July, sunrise is at 6:01 am and sunset at 8:09 pm CDT.

Sunshine

In Fayetteville, the average sunshine in July is 10.5h.

UV index

The months with the highest UV index in Fayetteville are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In July, a daily UV index of 6 turns into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Frequently asked questions

What are the warmest months in Fayetteville?

With average high and low temperatures of 86.5°F (30.3°C) and 68.5°F (20.3°C) respectively, July is Fayetteville's warmest month.

How hot is it in Fayetteville in July?

In Fayetteville, 86.5°F (30.3°C) is the average high-temperature and 68.5°F (20.3°C) is the average low-temperature during July. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is calculated to be 100.4°F (38°C).

What is the average humidity in July in Fayetteville?

In Fayetteville, Illinois, the average relative humidity in July is 78%.

How many days does it rain in July in Fayetteville?

In Fayetteville, in July, it is raining for 15.1 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow in Fayetteville?

In Fayetteville, Illinois, snow does not fall in April through August.

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

In Fayetteville, Illinois, the average day length in July is 14h and 32min.

When is the sunrise / sunset in July in Fayetteville?

In July, on the first day of the month, sunrise is at 5:39 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 8:09 pm CDT.

How many hours of sunshine does Fayetteville have in July?

In Fayetteville, the average sunshine duration in July is 10.5h.

What is the month with the highest UV index in Fayetteville?

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

What is the UV index reading in July in Fayetteville?

In Fayetteville, the average daily maximum UV index in July is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.
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
Fayetteville, IL

Average temperature in July - Fayetteville, IL
  • Average high temperature in July: 86.5°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.3°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 (25.2°F).

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Average pressure in July
Fayetteville, IL

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in July
Fayetteville, IL

Average wind speed in July - Fayetteville, IL
  • Average wind speed in July: 5.6mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

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Average humidity in July
Fayetteville, IL

Average humidity in July - Fayetteville, IL
  • Average humidity in July: 78%

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

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Average rainfall in July
Fayetteville, IL

Average rainfall in July - Fayetteville, IL
  • Average rainfall in July: 2.13"

The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is February (0.83").

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Average rainfall days in July
Fayetteville, IL

Average rainfall days in July - Fayetteville, IL
  • Average rainfall days in July: 15.1 days

The month with the highest number of rainy days is July (15.1 days).
The months with the least rainy days are January and December (6.5 days).

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Average snowfall in July
Fayetteville, IL

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

The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, May, June, July and August (0").

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Average snowfall days in July
Fayetteville, IL

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

The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July and August (0 days).

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

Average daylight in July / Average sunshine in July - Fayetteville, IL
  • Average daylight in July: 14h and 3min

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 July: 10h and 3min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in July
Fayetteville, IL

Average sunshine days in July - Fayetteville, IL
  • Average sunshine days in July: 13.7 days

The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is July (13.7 days).

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Average UV index in July
Fayetteville, IL

Average UV index in July - Fayetteville, 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, November and December (UV index 2).

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Average cloud cover in July
Fayetteville, IL

Average cloud cover in July - Fayetteville, IL
  • Average cloud cover in July: 28

The months with the most cloud cover are January and February (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 27).

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Average visibility in July
Fayetteville, IL

Average visibility in July - Fayetteville, 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).

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Fayetteville, Illinois, USA

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