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Weather Talk: We are near the end of rainy season

Approximately 74 percent of our average annual precipitation falls during just six months: May through October. Based on the current complete three decades, the month with the highest average rainfall by far is June with 3.90 inches. May and July are a distant second and third at 2.81 inches and 2.79 inches, respectively.

September is the fourth rainiest at 2.57 inches followed closely by August at 2.56 inches. October is the other relatively rainy month with an average of 2.15 inches.

September and October may seem wetter than the other warm weather months because evaporation rates are much lower in the fall. The lower evaporation rates are a result of cooler temperatures, shorter day length and a lower sun angle. This causes the ground to remain muddy longer after a fall rain than during the spring or summer months.

John Wheeler

John was born in Baton Rouge, LA, and grew up near Birmingham, Alabama. As a teenager, his family moved to Madison, Wisconsin, and later to a small town in northeast Iowa. John traces his early interest in weather to the difference in climate between Alabama and Wisconsin. He is a graduate of Iowa State University with a degree in meteorology. Like any meteorologist, John is intrigued by extremes of weather, especially arctic air outbreaks and winter storms.  John has been known to say he prefers his summers to be hot but in winter, he prefers the cold.  When away from work, John enjoys long-distance running and reading.  John has been a meteorologist at WDAY since May of 1985.

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