Stratford News Umbrellas a must today as significant rain falls in Perth County SHARE ON: Wendy Gray, staff Wednesday, May. 1st, 2019 Photo: Supplied Perth County is going to see a significant amount of rain. Environment Canada is calling for 20 to 40 millimetres of rain today and into tonight. There is even a possibility of a thunderstorm this (Wednesday) afternoon. The rain is expected to come to end on Thursday. All this rain is blamed on a Texas low that is tracking across Southern Ontario. There is good news on the horizon, the area is looking at a dry weekend with a high of 15C on Saturday and 18C on Sunday.