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
The warmest period is July, when temperatures fluctuate between an average high of 82.8°F (28.2°C) and a low of 66.6°F (19.2°C).Heat index
The heat index in July is appraised at a hot 91.4°F (33°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.Observations indicate that the heat index values are for shady locations with light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
July is the most humid month, with an average relative humidity of 83%.Rainfall
In Chatham, in July, it is raining for 10.8 days, with typically 0.91" (23mm) of accumulated precipitation. Throughout the year, in Chatham, there are 104.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.Snowfall
In Chatham, snow does not fall in May through October.Daylight
In July, the average length of the day in Chatham is 14h and 39min.On the first day of July in Chatham, sunrise is at 5:35 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:57 am and sunset at 8:12 pm CDT.
Sunshine
The average sunshine in July in Chatham is 10.2h.UV index
The months with the highest UV index in Chatham are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 6 during July translates into the following directions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in Chatham?
How hot does it get in Chatham in July?
What is the most humid month in Chatham?
What is the average humidity in July in Chatham?
How many days does it rain in July in Chatham?
When it does not snow in Chatham?
What is the average length of the day in July in Chatham?
When is the sunrise / sunset in July in Chatham?
How long on average sun shines in July in Chatham?
What are the months with the highest UV index in Chatham?
What is the UV index intensity in July in Chatham?
Average temperature in July
Chatham, IL
- Average high temperature in July: 82.8°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in July: 66.6°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in July
Chatham, 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 (29.91"Hg).
Average wind speed in July
Chatham, IL
- Average wind speed in July: 6.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in July
Chatham, IL
- Average humidity in July: 83%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in July
Chatham, IL
- Average rainfall in July: 0.91"
The wettest month (with the highest rainfall) is June (1.22").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in July
Chatham, IL
- Average rainfall days in July: 10.8 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in July
Chatham, IL
- Average snowfall in July: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in July
Chatham, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (5.7 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
Chatham, 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 24min).
- Average sunshine in July: 10h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in July
Chatham, IL
- Average sunshine days in July: 16 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14 days).
Average UV index in July
Chatham, 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
Chatham, IL
- Average cloud cover in July: 30
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in July
Chatham, IL
- Average visibility in July: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Chatham, Illinois, USA
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