For the most part the humidity is around 71%.July, like June, is another tropical summer month in Cape Girardeau, Missouri, with an average temperature varying between 69.4☏ (20.8☌) and 88.3☏ (31.3☌). TemperatureThe warmest month is July, with an average high-temperature of 88.3☏ (31.3☌) and an average low-temperature of 69.4☏ (20.8☌). Heat indexIn July, the average heat index is estimated at a blistering 104☏ (40☌). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke. Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees. Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, clothing, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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. The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5☏ (37.5☌) to 100.9☏ (38.3☌), thermal conditions are potentially life-threatening. HumidityThe average relative humidity in July is 76%. Rainfall In July, in Cape Girardeau, the rain falls for 17 days. Throughout July, 2.91" (74mm) of precipitation is accumulated. Throughout the year, in Cape Girardeau, there are 158.6 rainfall days, and 35.59" (904mm) of precipitation is accumulated.
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