July weather forecast
New Haven, IL

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Weather in July

July, the same as June, is a moderately hot summer month in New Haven, Illinois, with an average temperature ranging between max 85.6°F (29.8°C) and min 68.2°F (20.1°C).

Temperature

New Haven's July weather reaches an average high of 85.6°F (29.8°C) and an average low of 68.2°F (20.1°C), making it the warmest month.

Heat index

July's mean heat index is evaluated at a fiery hot 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

May and July, with an average relative humidity of 79%, are the most humid months in New Haven.

Rainfall

In New Haven, in July, it is raining for 11.3 days, with typically 0.79" (20mm) of accumulated precipitation. In New Haven, during the entire year, the rain falls for 100.2 days and collects up to 8.7" (221mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in July in New Haven is 14h and 29min.
On the first day of July, sunrise is at 5:34 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:02 pm CDT.

Sunshine

The average sunshine in July in New Haven, Illinois, is 10.5h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: An average maximum UV index of 6 in July leads to these recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the hottest time of year in New Haven?

July is the warmest month of the year in New Haven, registering average temperatures as high as 85.6°F (29.8°C) and as low as 68.2°F (20.1°C).

How hot is it in New Haven in July?

In July, in New Haven, the average high-temperature is 85.6°F (29.8°C), and the average low-temperature is 68.2°F (20.1°C). In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 98.6°F (37°C).

What is the most humid month in New Haven?

The months with the highest humidity in New Haven, Illinois, are May and July, with an average relative humidity of 79%.

What is the average humidity in July in New Haven?

The average relative humidity in July in New Haven is 79%.

How many days does it rain in July in New Haven?

In New Haven, Illinois, in July, during 11.3 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.

When it does not snow in New Haven?

In New Haven, Illinois, snow does not fall in April through October.

How many hours of daylight does New Haven have in July?

In July, the average day length in New Haven is 14h and 29min.

What time are sunrise and sunset in July in New Haven?

On the first day of July, sunrise is at 5:34 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:02 pm CDT.

How long on average sun shines in July in New Haven?

In New Haven, Illinois, the average sunshine duration in July is 10.5h.

When is the highest UV index in New Haven?

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

What is the UV index reading in July in New Haven?

The average daily maximum UV index in July in New Haven is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from 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
New Haven, IL

Average temperature in July - New Haven, IL
  • Average high temperature in July: 85.6°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.3°F).

  • Average low temperature in July: 68.2°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in July
New Haven, IL

Average pressure in July - New Haven, 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
New Haven, IL

Average wind speed in July - New Haven, IL
  • Average wind speed in July: 6mph

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in July
New Haven, IL

Average humidity in July - New Haven, IL
  • Average humidity in July: 79%

The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (69%).

Average rainfall in July
New Haven, IL

Average rainfall in July - New Haven, IL
  • Average rainfall in July: 0.79"

The wettest month (with the highest rainfall) is April (1.06").
The driest month (with the least rainfall) is September (0.28").

Average rainfall days in July
New Haven, IL

Average rainfall days in July - New Haven, IL
  • Average rainfall days in July: 11.3 days

The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is January (5 days).

Average snowfall in July
New Haven, IL

Average snowfall in July - New Haven, IL
  • Average snowfall in July: 0"

The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in July
New Haven, IL

Average snowfall days in July - New Haven, 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, September and October (0 days).

Average daylight in July /
Average sunshine in July
New Haven, IL

Average daylight in July / Average sunshine in July - New Haven, 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 36min).

  • 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 24min).

Average sunshine days in July
New Haven, IL

Average sunshine days in July - New Haven, IL
  • Average sunshine days in July: 16.9 days

The month with the most sunshine days is October (23.4 days).
The month with the least sunshine days is May (15.8 days).

Average UV index in July
New Haven, IL

Average UV index in July - New Haven, 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).

Average cloud cover in July
New Haven, IL

Average cloud cover in July - New Haven, IL
  • Average cloud cover in July: 28

The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 27).

Average visibility in July
New Haven, IL

Average visibility in July - New Haven, 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).

New Haven, Illinois, USA

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