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, July is identified by the highest average temperatures, reaching a peak of 85.8°F (29.9°C) and a low of 68.4°F (20.2°C).

Heat index

The heat index value for July is computed to be a fiery hot 98.6°F (37°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

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

Rainfall

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

Sunshine

In July, the average sunshine 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 estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum daily UV index of 6 during July morphs into the following directions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.