I spoke recently about things warming up from around the 10th of May.
This is a GEFS graph, if you have not seen it before the top part half the graph is the temperature at 5,000 feet. The bottom half of the graph is rainfall. It shows that we still have a few showery day until the 3rd then it looks dry until around the 7th then it goes showery but then it starts to really warm up. From around the 10th for several days we could see temperatures around 20 c or a little higher.
Please note this is still early days and things can change.