Optionally show rainfall average and record on the rainfall widget probably as two differently coloured horizontal lines. Setting to control this as well as line colours would be in the settings window.
For year this would just be the computed average and maximum across all years in the database. For the month it would be the average for that month (eg, May) across all years.
Graph rescaling could possibly be an issue. With this feature enabled the month/year axis rect may have to be always scaled to at least the record year rainfall which may result in the rainfall bars being very small early in the year. Perhaps this forced scaling would have to be an option too.
Optionally show rainfall average and record on the rainfall widget probably as two differently coloured horizontal lines. Setting to control this as well as line colours would be in the settings window.
For year this would just be the computed average and maximum across all years in the database. For the month it would be the average for that month (eg, May) across all years.
Graph rescaling could possibly be an issue. With this feature enabled the month/year axis rect may have to be always scaled to at least the record year rainfall which may result in the rainfall bars being very small early in the year. Perhaps this forced scaling would have to be an option too.