Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
The warmest temperatures occur during July, when averages reach a peak of 81°F (27.2°C) and a low of 64.6°F (18.1°C).Heat index
Throughout July, the heat index is calculated to be a tropical 87.8°F (31°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
The most humid month in Porterfield, Illinois, is July, with an average relative humidity of 85%.Rainfall
In Porterfield, in July, during 17.3 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, in Porterfield, there are 151.3 rainfall days, and 30.16" (766mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Porterfield.Daylight
In July, the average length of the day in Porterfield, Illinois, is 14h and 47min.On the first day of the month, sunrise is at 5:28 am and sunset at 8:32 pm. On the last day of July, in Porterfield, sunrise is at 5:52 am and sunset at 8:13 pm CDT.
Sunshine
In July, the average sunshine is 9.8h.UV index
June and July, with an average maximum UV index of 6, are months with the highest UV index in Porterfield. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 6 during July morphs into the following directions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What is the hottest time of year in Porterfield?
What are July temperatures in Porterfield?
What is the most humid month in Porterfield?
What is the average humidity in July in Porterfield?
How many days does it rain in July in Porterfield?
When it does not snow in Porterfield?
What is the average length of the day in July in Porterfield?
What time are sunrise and sunset in July in Porterfield?
How many hours of sunshine does Porterfield have in July?
What are the months with the highest UV index in Porterfield?
What is the UV index intensity in July in Porterfield?
Average temperature in July
Porterfield, IL
- Average high temperature in July: 81°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.3°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 (17.4°F).
Average pressure in July
Porterfield, IL
- Average pressure in July: 29.97"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).
Average wind speed in July
Porterfield, IL
- Average wind speed in July: 6.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in July
Porterfield, IL
- Average humidity in July: 85%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in July
Porterfield, IL
- Average rainfall in July: 2.76"
The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are January and December (1.57").
Average rainfall days in July
Porterfield, IL
- Average rainfall days in July: 17.3 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in July
Porterfield, IL
- Average snowfall in July: 0"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Porterfield, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Porterfield, 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 month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in July
Porterfield, IL
- Average sunshine days in July: 11 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in July
Porterfield, 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 January (UV index 1).
Average cloud cover in July
Porterfield, IL
- Average cloud cover in July: 33
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in July
Porterfield, IL
- Average visibility in July: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Porterfield, Illinois, USA
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