Perth will get another splash in its wettest May in eight years before the sun takes hold for the rest of the week. Perth has already been drenched by 105mm in its wettest May since 2005. Showers become a risk from this evening for the western capital with a few millimetres likely on Monday. There is also the chance of a storm with a heavy burst of rain to start the working week. Showers will clear early on Tuesday due to the building of a high pressure ridge. From Wednesday to the end of the week the sun will shine with marginal cloud cover. The mercury will rise to 23 degrees most days. The next chance of rain comes on the following Monday and Tuesday as a trough and front should arrive, bringing a few showers.