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
July, characterized by an average high temperature of 81.7°F (27.6°C) and a low temperature of 64.9°F (18.3°C), is generally the warmest month.Heat index
In July, the average heat index is evaluated at a hot 89.6°F (32°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.Observations indicate that the heat index values are for shady locations with light wind. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
January and July, with an average relative humidity of 83%, are the most humid months.Rainfall
In July, the rain falls for 15.3 days. Throughout July, 2.8" (71mm) of precipitation is accumulated. Throughout the year, there are 138.1 rainfall days, and 27.32" (694mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in July in Rock Island is 14h and 50min.On the first day of July, sunrise is at 5:32 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:20 pm CDT.
Sunshine
July has the most sunshine of the year, with an average of 10.2h of sunshine.UV index
July and August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 6 during July leads to these instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month?
What is the usual temperature for Rock Island in July?
What is the most humid month in Rock Island?
What is the average humidity in July?
How many days does it rain in July?
When it does not snow?
What is the average length of the day in July?
What time are sunrise and sunset in July?
What month has the most sunshine?
How long on average sun shines in July?
When is the highest UV index?
What is the UV index reading in July?
Average temperature in July
Rock Island, 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°F).
- Average low temperature in July: 64.9°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in July
Rock Island, 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 (29.9"Hg).
Average wind speed in July
Rock Island, 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).
Average humidity in July
Rock Island, 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%).
Average rainfall in July
Rock Island, IL
- Average rainfall in July: 2.8"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in July
Rock Island, IL
- Average rainfall days in July: 15.3 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in July
Rock Island, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (3.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Rock Island, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (10.9 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
Rock Island, 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 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in July
Rock Island, IL
- Average sunshine days in July: 12.5 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in July
Rock Island, IL
- Average UV index in July: 6
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in July
Rock Island, 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).
Average visibility in July
Rock Island, 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).
Rock Island, Illinois, USA
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