July weather forecastDes Plaines, IL
July
Weather in July
July in Des Plaines is the epitome of summer, boasting the hottest conditions of the year. It touches an average high of 80.6°F (27°C), inviting locals and tourists to experience and enjoy outdoor summer events. Although the skies are mostly clear, occasional rainfall adds to the charm without disrupting the overall dry and warm conditions. As July sets, the weather stays consistent, introducing yet another month of summer in August. Summer-loving folks can look forward to spending time outdoors during this period.Temperature
The warmest period tends to be July, when average temperatures fluctuate between a high of 80.6°F (27°C) and a low of 66.9°F (19.4°C).Heat index
July's heat index is computed to be 84.2°F (29°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.Note that heat index values are valued for light wind and location in the shade. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Humidity
The average relative humidity in July is 75%.Rainfall
In July, the rain falls for 17.8 days. Throughout July, 3.46" (88mm) of precipitation is accumulated. In Des Plaines, during the entire year, the rain falls for 153.1 days and collects up to 32.01" (813mm) of precipitation.Snowfall
In Des Plaines, snow does not fall in June through September.Daylight
The average length of the day in July is 14h and 53min.On the first day of July, sunrise is at 5:20 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:11 pm CDT.
Sunshine
July and August, with an average of 10.3h of sunshine, are months with the most sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 6 in July translates into these instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Des Plaines, 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 (28.8°F).
- Average low temperature in July: 66.9°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in July
Des Plaines, IL
- Average pressure in July: 29.97"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in July
Des Plaines, IL
- Average wind speed in July: 7mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in July
Des Plaines, IL
- Average humidity in July: 75%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in July
Des Plaines, IL
- Average rainfall in July: 3.46"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is December (1.5").
Average rainfall days in July
Des Plaines, IL
- Average rainfall days in July: 17.8 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in July
Des Plaines, IL
- Average snowfall in July: 0"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Des Plaines, 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 June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Des Plaines, IL
- Average daylight in July: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in July: 10h and 18min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in July
Des Plaines, IL
- Average sunshine days in July: 10.5 days
The months with the most sunshine days are November and December (16.9 days).
The month with the least sunshine days is April (10.4 days).
Average UV index in July
Des Plaines, IL
- Average UV index in July: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in July
Des Plaines, IL
- Average cloud cover in July: 29
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in July
Des Plaines, 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).
