When Was the Last Day We Hit 20c?

It’s starting to get warmer here in Melbourne. Today was the first day of over 20 degrees Celsius we’ve had in…well how long? It feels like a while. We hit this middle part of the year and we don’t get over 20C for a while. But I’d like to know the last time it got over 20 degrees Celsius. How do we do that? With the bomrang package by Adam …