There are occasional periods where a chart is flat, caused by the supplier of data being unavailable, maintenance, or other problems. The data is currently taken from the openweathernetwork site.
The fourth chart shows the minimum, mean and maximum for each day in the current year.
The last chart shows the annual temperature cycle since 2003. Each bar shows the minimum, mean and maximum temperature for a given year and month. This chart is updated automatically each night.
A history of the annual local temperatures by day is shown here.