July weather forecast
Port Byron, IL

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Weather in July

July, like June, in Port Byron, Illinois, is another warm summer month, with an average temperature varying between 64.8°F (18.2°C) and 81.7°F (27.6°C).

Temperature

In Port Byron, temperatures reach their average annual highs in July, measuring 81.7°F (27.6°C) and a minimum average of 64.8°F (18.2°C).

Heat index

The heat index in July is appraised at a tropical 89.6°F (32°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.
When assessing, remember that heat index measurements are for light winds and shaded spots. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.

Humidity

January and July, with an average relative humidity of 83%, are the most humid months.

Rainfall

In Port Byron, Illinois, in July, it is raining for 11.2 days, with typically 1.18" (30mm) of accumulated precipitation. In Port Byron, during the entire year, the rain falls for 99.4 days and collects up to 9.57" (243mm) of precipitation.

Snowfall

In Port Byron, snow does not fall in May through August.

Daylight

In July, the average length of the day in Port Byron is 14h and 50min.
On the first day of July, sunrise is at 5:31 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:19 pm CDT.

Sunshine

With an average of 10.1h of sunshine, July has the most sunshine of the year in Port Byron, Illinois.

UV index

With an average maximum UV index of 6, July is the month with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average UV index of 6 in July transforms into this advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. 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. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

What time of the year is the hottest in Port Byron?

Temperature records in Port Byron, Illinois, mark July as the warmest month, with highs averaging 81.7°F (27.6°C) and lows at 64.8°F (18.2°C).

What is the usual temperature for Port Byron in July?

In July, in Port Byron, the average high-temperature is 81.7°F (27.6°C), and the average low-temperature is 64.8°F (18.2°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 89.6°F (32°C).

What is the most humid month in Port Byron?

January and July, with an average relative humidity of 83%, are most humid months.

What is the average humidity in July in Port Byron?

The average relative humidity in July in Port Byron is 83%.

How many days does it rain in July in Port Byron?

In July, in Port Byron, Illinois, the rain falls for 11.2 days. Throughout July, 1.18" (30mm) of precipitation is accumulated.

When it does not snow in Port Byron?

May through August are months without snowfall in Port Byron, Illinois.

How many hours of daylight does Port Byron have in July?

In July, the average day length in Port Byron is 14h and 50min.

What time are sunrise and sunset in July in Port Byron?

In July, on the first day of the month, sunrise is at 5:31 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:19 pm CDT.

What month has the most sunshine in Port Byron?

The month with the most sunshine in Port Byron, Illinois, is July, with an average of 10.1h of sunshine.

How many hours of sunshine does Port Byron have in July?

In Port Byron, Illinois, the average sunshine duration in July is 10.1h.

When is the highest UV index in Port Byron?

July is the month with the highest UV index in Port Byron, with an average maximum UV index of 6.

How high is the UV index in July in Port Byron?

The average daily maximum UV index in July in Port Byron is 6. A UV Index value of 6 to 7 symbolizes 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
Port Byron, IL

Average temperature in July - Port Byron, IL
  • Average high temperature in July: 81.7°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in July: 64.8°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).

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Average pressure in July
Port Byron, IL

Average pressure in July - Port Byron, IL
  • Average pressure in July: 29.96"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in July
Port Byron, IL

Average wind speed in July - Port Byron, IL
  • Average wind speed in July: 6.8mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).

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Average humidity in July
Port Byron, IL

Average humidity in July - Port Byron, IL
  • Average humidity in July: 83%

The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in July
Port Byron, IL

Average rainfall in July - Port Byron, IL
  • Average rainfall in July: 1.18"

The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").

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Average rainfall days in July
Port Byron, IL

Average rainfall days in July - Port Byron, IL
  • Average rainfall days in July: 11.2 days

The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).

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Average snowfall in July
Port Byron, IL

Average snowfall in July - Port Byron, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").

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Average snowfall days in July
Port Byron, IL

Average snowfall days in July - Port Byron, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (7.2 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
Port Byron, IL

Average daylight in July / Average sunshine in July - Port Byron, 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: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in July
Port Byron, IL

Average sunshine days in July - Port Byron, IL
  • Average sunshine days in July: 16.2 days

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).

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Average UV index in July
Port Byron, IL

Average UV index in July - Port Byron, IL
  • Average UV index in July: 6

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in July
Port Byron, IL

Average cloud cover in July - Port Byron, IL
  • Average cloud cover in July: 31

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in July
Port Byron, IL

Average visibility in July - Port Byron, 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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Port Byron, Illinois, USA

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