July weather forecast
Millbrook, IL

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Weather in July

July, like June, in Millbrook, Illinois, is another warm summer month, with an average temperature varying between 80.6°F (27°C) and 63.5°F (17.5°C).

Temperature

In Millbrook, the average temperatures in July are the highest, with a peak at 80.6°F (27°C) and a low of 63.5°F (17.5°C).

Heat index

July's average heat index is calculated to be a tropical 86°F (30°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. 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 are extremely vital to babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.

Humidity

The months with the highest humidity are July and August, with an average relative humidity of 84%.

Rainfall

In Millbrook, in July, it is raining for 20.3 days, with typically 3.9" (99mm) of accumulated precipitation. Throughout the year, there are 168.3 rainfall days, and 35.47" (901mm) of precipitation is accumulated.

Snowfall

In Millbrook, snow does not fall in May through September.

Daylight

In Millbrook, Illinois, the average length of the day in July is 14h and 50min.
On the first day of July, sunrise is at 5:24 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:12 pm CDT.

Sunshine

In July, the average sunshine is 9.5h.

UV index

June and July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 6 in July, converts into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the warmest months?

In Millbrook, July registers the highest temperatures, averaging 80.6°F (27°C) at the peak and 63.5°F (17.5°C) at the lowest.

What is the usual temperature for Millbrook in July?

The average high-temperature and low-temperature during July are 80.6°F (27°C) and 63.5°F (17.5°C) respectively. In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 86°F (30°C).

What is the most humid month?

The months with the highest humidity are July and August, with an average relative humidity of 84%.

What is the average humidity in July?

In July, the average relative humidity is 84%.

How many days does it rain in July?

In Millbrook, during July, the rain falls for 20.3 days and regularly aggregates up to 3.9" (99mm) of precipitation.

When it does not snow?

In Millbrook, snow does not fall in May through September.

What is the average length of the day in July?

The average day length in July is 14h and 50min.

When are sunrise and sunset in July?

In July, on the first day of the month, sunrise is at 5:24 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:12 pm CDT.

How many hours of sunshine does Millbrook have in July?

In July, the average sunshine duration is 9.5h.

What are the months with the highest UV index?

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

How high is the UV index in July?

In July, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk 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
Millbrook, IL

Average temperature in July - Millbrook, IL
  • Average high temperature in July: 80.6°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in July: 63.5°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

Average pressure in July
Millbrook, IL

Average pressure in July - Millbrook, 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).

Average wind speed in July
Millbrook, IL

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

The windiest months (with the highest average wind speed) are January and April (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in July
Millbrook, IL

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

The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is October (74%).

Average rainfall in July
Millbrook, IL

Average rainfall in July - Millbrook, IL
  • Average rainfall in July: 3.9"

The wettest month (with the highest rainfall) is May (4.88").
The driest month (with the least rainfall) is November (1.73").

Average rainfall days in July
Millbrook, IL

Average rainfall days in July - Millbrook, IL
  • Average rainfall days in July: 20.3 days

The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is February (6 days).

Average snowfall in July
Millbrook, IL

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

The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in July
Millbrook, IL

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

The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Millbrook, 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 12min).

  • Average sunshine in July: 9h and 3min

The months with the most sunshine are June and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in July
Millbrook, IL

Average sunshine days in July - Millbrook, IL
  • Average sunshine days in July: 7.2 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is July (7.2 days).

Average UV index in July
Millbrook, IL

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

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

Average cloud cover in July
Millbrook, IL

Average cloud cover in July - Millbrook, IL
  • Average cloud cover in July: 36

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 34).

Average visibility in July
Millbrook, IL

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

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

Millbrook, Illinois, USA

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