Description of Temperature and Precipitation Graphs
The Temperature and Precipitation Graphs presented in this section are composed of two separate plot areas.
The top portion describes the annual temperature regime for a single station. It is composed of three graphic elements:
- The pink shaded area represents the normal range of daily temperature plotted for each day of the year. It is derived from 30 years (1961-1990) of daily maximum and minimum temperatures observed at the site.
- A series of vertical red bars represents daily observations of maximum and minimum temperatures observed at the site for the observation year.
- The solid black line is a 5-day moving average of the calculated average daily temperature. It is intended to represent short-term variation in average temperature. It does not represent the average temperature on any given day.
The bottom portion of the graph describes the annual precipitation regime for the station. It is composed of two graphic elements:
- The light green line represents an accumulation of normal daily precipitation values derived from a 30-year record (1961-1990).
- The dark green line is the accumulated daily precipitation values observed for the depicted year.
