The first month of the summer, June
, is still a warm month in St. Louis
, with an average temperature ranging between max 85.1°F (29.5°C) and min 66.7°F (19.3°C).
In June, the average high-temperature in St. Louis marginally rises from a warm 76.3°F (24.6°C) in May
to a still moderately hot 85.1°F (29.5°C). The average low-temperature, in June, in St. Louis, is 66.7°F (19.3°C).
The average heat index in June is evaluated at a hot 91.8°F (33.2°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.Note
: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, metabolic differences), and activity. 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 especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
In St. Louis, Missouri
, the average relative humidity in June is 67.1%.
In St. Louis, during June, the rain falls for 10 days and regularly aggregates up to 4.28" (108.7mm) of precipitation. Throughout the year, in St. Louis, there are 112.6 rainfall days, and 40.96" (1040.3mm) of precipitation is accumulated.
May through October
are months without snowfall in St. Louis, Missouri.
The month with the longest days in St. Louis is June, with an average of 14h and 49min of daylight.
On the first day of June in St. Louis, sunrise is at 5:37 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:29 pm CDT.
In St. Louis, Missouri, the average sunshine in June is 9.7h.
The months with the highest UV index in St. Louis are June through August
, with an average maximum UV index of 9. A UV Index reading of 8 to 10 represents a very high health risk from exposure to the Sun's UV rays for the average person.Note
: The average daily UV index of 9 in June transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect 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. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.