July weather forecastCrystal Lake, IL
July
Weather in July
July, the same as June, is a moderately hot summer month in Crystal Lake, Illinois, with an average temperature varying between 79.5°F (26.4°C) and 63.1°F (17.3°C).Temperature
With average high and low temperatures of 79.5°F (26.4°C) and 63.1°F (17.3°C) respectively, July is Crystal Lake's warmest month.Humidity
In Crystal Lake, the average relative humidity in July is 83%.Rainfall
In July, the rain falls for 18.5 days. Throughout July, 2.32" (59mm) of precipitation is accumulated. In Crystal Lake, during the entire year, the rain falls for 146.9 days and collects up to 21.22" (539mm) of precipitation.Snowfall
In Crystal Lake, snow does not fall in June through September.Daylight
The average length of the day in July is 14h and 54min.On the first day of the month, sunrise is at 5:21 am and sunset at 8:33 pm. On the last day of July, in Crystal Lake, sunrise is at 5:45 am and sunset at 8:13 pm CDT.
Sunshine
With an average of 10h of sunshine, July has the most sunshine of the year.UV index
The average daily maximum UV index in July is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In July, the maximum UV index of 5 suggests this advice:
Adopt protective measures - It is advised to guard against sun damage. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Crystal Lake, IL
- Average high temperature in July: 79.5°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in July: 63.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in July
Crystal Lake, 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
Crystal Lake, IL
- Average wind speed in July: 6.4mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in July
Crystal Lake, IL
- Average humidity in July: 83%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in July
Crystal Lake, IL
- Average rainfall in July: 2.32"
The wettest month (with the highest rainfall) is June (2.8").
The driest months (with the least rainfall) are November and December (0.94").
Average rainfall days in July
Crystal Lake, IL
- Average rainfall days in July: 18.5 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in July
Crystal Lake, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Crystal Lake, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Crystal Lake, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in July
Crystal Lake, IL
- Average sunshine days in July: 10 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is July (10 days).
Average UV index in July
Crystal Lake, IL
- Average UV index in July: 5
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in July
Crystal Lake, IL
- Average cloud cover in July: 32
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and September (Cloud cover 32).
Average visibility in July
Crystal Lake, IL
- Average visibility in July: 6mi
The months with the highest visibility are March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January, February and August (5mi).
