The above map is for short term 15 minute durations, typically used for urban drainage design, and flood risk assessments. An interactive map and table of all Environment Canada's Ontario climate stations is available at this post.
An interactive map for all Canadian stations is available here. The following graph summarizes similar trends across Canada for shorter and longer rainfall durations (5 minutes to 24 hours).
|Ottawa Climate Change - Less Severe Storm Trends|
|Toronto Climate Change - Less Severe Storm Trends|
|Windsor Climate Change - Less Severe Storm Trends|
Extreme rainfall trends in Canada (Environment Canada Engineering Climate Datasets):
Static Maps: http://www.cityfloodmap.com/2015/12/severe-storm-trends-canada-rainfall.html
Interactive Map: http://www.cityfloodmap.com/2015/12/canadian-extreme-rainfall-map-climate.html
Table Summaries: http://www.cityfloodmap.com/2015/12/canadian-extreme-rainfall-summary-by.html
Chart and Table: http://www.cityfloodmap.com/2015/12/top-weather-story-in-canada-2015-less.html
Environment Canada Denies Changes: http://www.cityfloodmap.com/2015/10/bogus-statements-on-storms-in-cbcnewsca.html
Contradicting Insurance Industry Claims: http://www.cityfloodmap.com/2015/12/trends-in-canadian-shortduration.html