This GEFS graph is indicating a cooler and showery outlook for the next two weeks. An explanation of the graph is the top half of the graph is temperature at 5,000 feet and the bottom of the graph is rainfall.
So you can see at the moment the temperature is 10 c at 5,000 feet giving us top day temperatures around 22- 24 c at ground level. You can see there will be a gradual decrease in the temperature down to 5 c, this will be a top temperature for us at ground level around 17 c.
The bottom of the graph is rainfall, it looks like there will be some rain on most day. But looking at the spikes I see this been more like showers than days of prolonged rain accept for the 21st June but that’s a long way off at this time.