July weather forecastHerald, IL
July
Weather in July
July, the same as June, is another warm summer month in Herald, Illinois, with an average temperature ranging between min 68.2°F (20.1°C) and max 85.6°F (29.8°C).Temperature
Herald's July weather, marked by an average high temperature of 85.6°F (29.8°C) and an average low temperature of 68.2°F (20.1°C), is the warmest in the year.Heat index
July's average heat index is estimated at a torrid 98.6°F (37°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.Always consider that heat index estimations are for light winds and places in the shade. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
May and July, with an average relative humidity of 79%, are the most humid months.Rainfall
In Herald, in July, during 11.3 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 100.2 rainfall days, and 8.7" (221mm) of precipitation is accumulated.Snowfall
In Herald, Illinois, snow does not fall in April through October.Daylight
In Herald, the average length of the day in July is 14h and 29min.On the first day of July, sunrise is at 5:34 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:02 pm CDT.
Sunshine
In Herald, the average sunshine in July is 10.5h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 6 in July transforms into the following instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Herald, IL
- Average high temperature in July: 85.6°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in July: 68.2°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in July
Herald, 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
Herald, IL
- Average wind speed in July: 6mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in July
Herald, IL
- Average humidity in July: 79%
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall in July
Herald, IL
- Average rainfall in July: 0.79"
The wettest month (with the highest rainfall) is April (1.06").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in July
Herald, IL
- Average rainfall days in July: 11.3 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is January (5 days).
Average snowfall in July
Herald, IL
- Average snowfall in July: 0"
The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in July
Herald, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (3.3 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
Herald, IL
- Average daylight in July: 14h and 30min
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 36min).
- Average sunshine in July: 10h and 30min
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
Herald, IL
- Average sunshine days in July: 16.9 days
The month with the most sunshine days is October (23.4 days).
The month with the least sunshine days is May (15.8 days).
Average UV index in July
Herald, IL
- Average UV index in July: 6
The months with the highest UV index are May, 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
Herald, IL
- Average cloud cover in July: 28
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility in July
Herald, 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).
