June weather forecast
Marion, IL

Summer is in full effect during June in Marion, boasting the longest daylight hours of the year. The average temperatures rise to become the highest of the year, with the high averaging 84.7°F (29.3°C) and lows around 66.4°F (19.1°C). The duration of sunshine also hits its peak in June, providing plenty of warmth and light. Despite the high temperature, the rainfall remains under control. As June transitions to July, the temperature remains relatively stable, but expect a slight increase in rainfall.

Temperature

June brings a rise in Marion's average high-temperature, moving from a warm 75.4°F (24.1°C) in May to a still moderately hot 84.7°F (29.3°C). Throughout June, an average nighttime temperature of 66.4°F (19.1°C) is experienced in Marion.

Heat index

For June, the heat index is calculated to be a fiery hot 95°F (35°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In Marion, the average relative humidity in June is 76%.

Rainfall

In Marion, in June, it is raining for 13.3 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, there are 137.6 rainfall days, and 23.03" (585mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Marion.

Daylight

June has the longest days of the year, with an average of 14h and 42min of daylight.
On the first day of June in Marion, sunrise is at 5:35 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:37 am and sunset at 8:21 pm CDT.

Sunshine

The months with the most sunshine in Marion are June and July, with an average of 10.5h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Marion. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 6 in June transforms into this advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.