Environment Canada does not report the daily maximum and minimum temperatures that are required by the PomeBlight model. Environment Canada reports the low nighttime temperature from 5 PM to 5 AM and the high daytime temperature from 5 AM to 5 PM. We know that the morning temperatures are most likely the coldest in a day. Therefore, we have shifted the forecast to use the previous day’s nighttime low temperature with the current day’s daytime high temperature.