July weather forecast
Wilmington, IL

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Weather in July

July, the same as June, is a moderately hot summer month in Wilmington, Illinois, with an average temperature fluctuating between 64.6°F (18.1°C) and 81.1°F (27.3°C).

Temperature

July, having an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 64.6°F (18.1°C), is the warmest month.

Heat index

In July, the heat index is calculated to be a tropical 87.8°F (31°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.
Heat index determinations are made taking into account the shade and light air movements. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.

Humidity

The most humid month in Wilmington is July, with an average relative humidity of 84%.

Rainfall

In Wilmington, during July, the rain falls for 19 days and regularly aggregates up to 3.58" (91mm) of precipitation. Throughout the year, in Wilmington, there are 160.4 rainfall days, and 33.5" (851mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Wilmington, Illinois.

Daylight

In Wilmington, the average length of the day in July is 14h and 49min.
On the first day of July in Wilmington, Illinois, sunrise is at 5:23 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:10 pm CDT.

Sunshine

The months with the most sunshine are June through August, with an average of 9.8h of sunshine.

UV index

The months with the highest UV index in Wilmington are June and July, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in July interprets into the following advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What is the warmest month in Wilmington?

In Wilmington, the peak temperatures are generally noted in July, averaging a high of 81.1°F (27.3°C) and a low of 64.6°F (18.1°C).

What are July temperatures in Wilmington?

In July, the average high-temperature and low-temperature in Wilmington are 81.1°F (27.3°C) and 64.6°F (18.1°C) respectively. In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is calculated to be 87.8°F (31°C).

What is the most humid month in Wilmington?

July is the most humid month in Wilmington, with an average relative humidity of 84%.

What is the average humidity in July in Wilmington?

In Wilmington, the average relative humidity in July is 84%.

How many days does it rain in July in Wilmington?

In Wilmington, during July, the rain falls for 19 days and regularly aggregates up to 3.58" (91mm) of precipitation.

When it does not snow in Wilmington?

May through September are months without snowfall in Wilmington, Illinois.

How many hours of daylight does Wilmington have in July?

In Wilmington, the average day length in July is 14h and 49min.

When are sunrise and sunset in July in Wilmington?

On the first day of July, sunrise is at 5:23 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:10 pm CDT.

What is the month with the most sunshine in Wilmington?

The months with the most sunshine are June through August, with an average of 9.8h of sunshine.

How many hours of sunshine does Wilmington have in July?

The average sunshine duration in July in Wilmington, Illinois, is 9.8h.

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

The months with the highest UV index in Wilmington, Illinois, are June and July, with an average maximum UV index of 6.

How high is the UV index in July in Wilmington?

In Wilmington, Illinois, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high hazard to health 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
Wilmington, IL

Average temperature in July - Wilmington, 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 (29.7°F).

  • Average low temperature in July: 64.6°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

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Average pressure in July
Wilmington, IL

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

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in July
Wilmington, IL

Average wind speed in July - Wilmington, IL
  • Average wind speed in July: 6.2mph

The windiest months (with the highest average wind speed) are January and April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in July
Wilmington, IL

Average humidity in July - Wilmington, IL
  • Average humidity in July: 84%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in July
Wilmington, IL

Average rainfall in July - Wilmington, IL
  • Average rainfall in July: 3.58"

The wettest month (with the highest rainfall) is May (4.57").
The driest months (with the least rainfall) are February and November (1.69").

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Average rainfall days in July
Wilmington, IL

Average rainfall days in July - Wilmington, IL
  • Average rainfall days in July: 19 days

The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is January (5.8 days).

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Average snowfall in July
Wilmington, IL

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

The month with the highest snowfall is February (4.29").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in July
Wilmington, IL

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

The month with the highest number of snowfall days is January (10.6 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
Wilmington, IL

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in July: 9h and 5min

The months with the most sunshine are June, July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in July
Wilmington, IL

Average sunshine days in July - Wilmington, IL
  • Average sunshine days in July: 8.6 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (8.6 days).

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Average UV index in July
Wilmington, IL

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

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

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Average cloud cover in July
Wilmington, IL

Average cloud cover in July - Wilmington, IL
  • Average cloud cover in July: 34

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).

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Average visibility in July
Wilmington, IL

Average visibility in July - Wilmington, IL
  • Average visibility in July: 5mi

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

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Wilmington, Illinois, USA

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