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 Sumner, July is the warmest month, with temperatures averaging a high of 84°F (28.9°C) and a low of 67.3°F (19.6°C).Heat index
July's heat index is calculated to be a very hot 95°F (35°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
With an average relative humidity of 81%, July is the most humid month.Rainfall
In July, the rain falls for 16.8 days. Throughout July, 3.11" (79mm) of precipitation is accumulated. In Sumner, during the entire year, the rain falls for 160.3 days and collects up to 34.33" (872mm) of precipitation.Snowfall
May through October are months without snowfall in Sumner, Illinois.Daylight
The average length of the day in July is 14h and 34min.On the first day of the month, sunrise is at 5:30 am and sunset at 8:20 pm. On the last day of July, sunrise is at 5:52 am and sunset at 8:02 pm CDT.
Sunshine
In July, the average sunshine in Sumner is 10.4h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 6 during July, leads to the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months in Sumner?
Is it hot in Sumner during July?
What is the most humid month in Sumner?
What is the average humidity in July in Sumner?
How many days does it rain in July in Sumner?
When it does not snow in Sumner?
What is the average length of the day in July in Sumner?
What time are sunrise and sunset in July in Sumner?
How long on average sun shines in July in Sumner?
When is the highest UV index in Sumner?
What is the UV index intensity in July in Sumner?
Average temperature in July
Sumner, IL
- Average high temperature in July: 84°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in July: 67.3°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in July
Sumner, IL
- Average pressure in July: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in July
Sumner, IL
- Average wind speed in July: 5.8mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in July
Sumner, IL
- Average humidity in July: 81%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in July
Sumner, IL
- Average rainfall in July: 3.11"
The wettest month (with the highest rainfall) is April (4.69").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in July
Sumner, IL
- Average rainfall days in July: 16.8 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is February (9.4 days).
Average snowfall in July
Sumner, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in July
Sumner, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in July /
Average sunshine in July
Sumner, IL
- Average daylight in July: 14h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in July: 10h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in July
Sumner, IL
- Average sunshine days in July: 10.9 days
The month with the most sunshine days is October (18 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in July
Sumner, 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
Sumner, IL
- Average cloud cover in July: 29
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in July
Sumner, 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).
Sumner, Illinois, USA
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