to the Hourly Climatology Project. The hourly climatology of several ASOS sites across Pennsylvania were computed using hourly data available for each site. As an example, the hourly climatology was calculated for the average temperature over the past 40+ years at Philadelphia International Airport at 7 AM on January 1st. Data includes the average temperature, dew point temperature, and pressure, as well as the standard deviation of each variable, available for each hour of every day of the year at each site.

To begin, select a site on the map designated with a red circle. Once a site is selected, the next page will allow you to choose the date of interest.

Hourly Climatology Site Selection