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 is the month when Chesterfield's temperatures reach their peak, with averages of 83.8°F (28.8°C) and lows of 66.9°F (19.4°C).Heat index
The heat index value during July is calculated to be a fiery hot 95°F (35°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.Observations indicate that the heat index values are for shady locations with light wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
July is the most humid month, with an average relative humidity of 82%.Rainfall
In Chesterfield, in July, it is raining for 15.3 days, with typically 2.17" (55mm) of accumulated precipitation. In Chesterfield, during the entire year, the rain falls for 138.2 days and collects up to 23.31" (592mm) of precipitation.Snowfall
In Chesterfield, snow does not fall in April through October.Daylight
In July, the average length of the day in Chesterfield is 14h and 37min.On the first day of the month, sunrise is at 5:37 am and sunset at 8:30 pm. On the last day of July, in Chesterfield, sunrise is at 6:00 am and sunset at 8:12 pm CDT.
Sunshine
In July, the average sunshine is 10.2h.UV index
The months with the highest UV index in Chesterfield, Illinois, are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 6 in July translates into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What part of the year is the hottest in Chesterfield?
How hot does it get in Chesterfield in July?
What is the most humid month in Chesterfield?
What is the average humidity in July in Chesterfield?
How many days does it rain in July in Chesterfield?
When it does not snow in Chesterfield?
What is the average length of the day in July in Chesterfield?
What time are sunrise and sunset in July in Chesterfield?
How many hours of sunshine does Chesterfield have in July?
What is the month with the highest UV index in Chesterfield?
What is the UV index intensity in July in Chesterfield?
Average temperature in July
Chesterfield, IL
- Average high temperature in July: 83.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°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 (22.5°F).
Average pressure in July
Chesterfield, IL
- Average pressure in July: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in July
Chesterfield, IL
- Average wind speed in July: 5.8mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in July
Chesterfield, IL
- Average humidity in July: 82%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in July
Chesterfield, IL
- Average rainfall in July: 2.17"
The wettest month (with the highest rainfall) is June (3.07").
The driest months (with the least rainfall) are January and February (1.22").
Average rainfall days in July
Chesterfield, IL
- Average rainfall days in July: 15.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in July
Chesterfield, IL
- Average snowfall in July: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in July
Chesterfield, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is February (6.3 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
Chesterfield, IL
- Average daylight in July: 14h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in July: 10h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in July
Chesterfield, IL
- Average sunshine days in July: 13 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in July
Chesterfield, 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, February, November and December (UV index 2).
Average cloud cover in July
Chesterfield, IL
- Average cloud cover in July: 30
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in July
Chesterfield, 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).
Chesterfield, Illinois, USA
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