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
In Marseilles, Illinois, the month of July is known for its highest average temperatures, reaching a high of 81°F (27.2°C) and a low of 64.2°F (17.9°C).Heat index
For most parts of July, the heat index is estimated at a tropical 87.8°F (31°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Note that heat index values are valued for light wind and location in the shade. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. 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 quite important for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
With an average relative humidity of 85%, July is the most humid month.Rainfall
In July, the rain falls for 17.6 days. Throughout July, 3.27" (83mm) of precipitation is accumulated. Throughout the year, there are 154.1 rainfall days, and 31.73" (806mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in July is 14h and 49min.On the first day of the month, sunrise is at 5:25 am and sunset at 8:31 pm. On the last day of July, sunrise is at 5:49 am and sunset at 8:12 pm CDT.
Sunshine
In July, the average sunshine is 9.7h.UV index
June and July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 6 during July leads to these instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest?
What are the temperatures in July?
What is the most humid month in Marseilles?
What is the average humidity in July?
How much does it rain in July?
When it does not snow?
How many hours of daylight does Marseilles have in July?
What time are sunrise and sunset in July?
How long on average sun shines in July?
What are the months with the highest UV index?
What is the UV index intensity in July?
Average temperature in July
Marseilles, 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 (29.1°F).
- Average low temperature in July: 64.2°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in July
Marseilles, IL
- Average pressure in July: 29.97"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in July
Marseilles, IL
- Average wind speed in July: 6.3mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in July
Marseilles, 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
Marseilles, IL
- Average rainfall in July: 3.27"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in July
Marseilles, IL
- Average rainfall days in July: 17.6 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in July
Marseilles, IL
- Average snowfall in July: 0"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Marseilles, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (11.9 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
Marseilles, 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 4min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in July
Marseilles, IL
- Average sunshine days in July: 10.8 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in July
Marseilles, 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
Marseilles, IL
- Average cloud cover in July: 34
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in July
Marseilles, 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).
Marseilles, Illinois, USA
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