The average temperature for May will be above normal. Precipitation will be near normal for the month.
After three cool wet months the weather pattern will change at the start of May. Southerly winds will bring much warmer air to Ohio at the beginning of the month and we will get our first taste of more summerlike temperatures. West to east flow in the atmosphere will bring periodic storms which will cause fluctuations in the temperature.
More days with southerly winds will result in the average temperature being above normal during May. Those southerly winds will also bring moist air to the state and periodic rains will produce near normal precipitation during the month. Low pressure systems and their associated cold fronts could generate severe weather when they move across the state.