July weather forecastRiver Forest, IL
July
Weather in July
July, the same as June, is a moderately hot summer month in River Forest, Illinois, with temperature in the range of an average low of 67.5°F (19.7°C) and an average high of 79.7°F (26.5°C).Temperature
In River Forest, Illinois, the highest average temperatures are observed in July, with a high of 79.7°F (26.5°C) and a low of 67.5°F (19.7°C).Humidity
In River Forest, Illinois, the average relative humidity in July is 76%.Rainfall
In River Forest, in July, during 18.5 rainfall days, 3.74" (95mm) of precipitation is typically accumulated. Throughout the year, in River Forest, there are 157.8 rainfall days, and 33.7" (856mm) of precipitation is accumulated.Snowfall
In River Forest, snow does not fall in June through September.Daylight
The average length of the day in July in River Forest is 14h and 52min.On the first day of the month, sunrise is at 5:20 am and sunset at 8:30 pm. On the last day of July, sunrise is at 5:44 am and sunset at 8:10 pm CDT.
Sunshine
In River Forest, the average sunshine in July is 10.4h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 6 in July converts into the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
River Forest, IL
- Average high temperature in July: 79.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in July: 67.5°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in July
River Forest, 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
River Forest, IL
- Average wind speed in July: 7mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in July
River Forest, IL
- Average humidity in July: 76%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in July
River Forest, IL
- Average rainfall in July: 3.74"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days in July
River Forest, IL
- Average rainfall days in July: 18.5 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in July
River Forest, IL
- Average snowfall in July: 0"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
River Forest, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
River Forest, 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 24min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in July
River Forest, IL
- Average sunshine days in July: 9.9 days
The month with the most sunshine days is December (16.7 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in July
River Forest, IL
- Average UV index in July: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in July
River Forest, IL
- Average cloud cover in July: 28
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in July
River Forest, 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).
