The number of days reaching 90 degrees or higher so far this year has been relatively few across the central Ohio Valley; as of August 27th, there have only been 7 days in Cincinnati, 13 in Columbus, and 10 days in Dayton. Some locations may still climb into the lower 90s at least one more time this week.
Based on the 30-year climatological normal period 1981 to 2010, there are on average 21 days each year reaching 90 degrees or higher in Cincinnati, 18 days in Columbus, and 14 days in Dayton. Below are graphs (as of 8/25) showing the annual frequency of days in the 90s for each of our three climate stations, beginning with the first full year of data on record for each site. Click each graph for a larger version. Click here for the full dataset.