July weather forecast
Belleville, IL

July stands as the epitome of summer in Belleville. Carrying the baton from June, July continues to grace the city with abundant sunshine and culminates in summer's highest average high and low temperatures from 85.8°F (29.9°C) to 68.4°F (20.2°C). This hot and humid phase embraces outdoor activities, as water bodies become focal points of leisure. A decrease in wind speed, down to 5.6mph (9km/h), further aids to the establishment of July's warm, tranquil weather. Under a spectacular canopy of blue skies, Belleville thrives in the peak of summer.

Temperature

In Belleville, the peak temperatures are generally noted in July, averaging a high of 85.8°F (29.9°C) and a low of 68.4°F (20.2°C).

Heat index

The heat index for July is estimated at a fiery hot 98.6°F (37°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Heat index determinations are made taking into account the shade and light air movements. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The months with the highest humidity in Belleville are May and July, with an average relative humidity of 79%.

Rainfall

In Belleville, in July, it is raining for 16.3 days, with typically 3.43" (87mm) of accumulated precipitation. In Belleville, during the entire year, the rain falls for 147.1 days and collects up to 35.43" (900mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Belleville, the average length of the day in July is 14h and 32min.
On the first day of the month, sunrise is at 5:39 am and sunset at 8:28 pm. On the last day of July, in Belleville, sunrise is at 6:01 am and sunset at 8:10 pm CDT.

Sunshine

In Belleville, the average sunshine in July is 10.1h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: An average maximum UV index of 6 in July leads to these recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.