A clothes line index is being considered by the MetService to make weather predictions more user-friendly.
As well as providing the usual predictions about temperatures, rain and wind, the MetService website already advises people on how many layers of clothing to wear, to suit the conditions.
Now it is considering going a step further and introducing a section that will forecast the best days to hang out washing.
"Bringing in a clothes line index is certainly something that has been recently discussed," MetService spokesman Daniel Corbett said.
"If we are already predicting how many layers of clothes people should be wearing or what surf conditions are like, it isn't such a silly idea to forecast if it is going to be nice enough to hang out the laundry.