No. Check
http://www.toronto.net/WeatherHistory.aspx . Toronto's temperatures from July 1st to July 18th in 2006 were on average 2.3°C warmer than 2007, with 3 days over 30°C in July 1-18, 2007 vs. 5 days over 30°C in July 1-18, 2006. The same period in 2005 had 6 days over 30°C.
2006 - High Temps - July 1 - 18
Jul 1, 29 °C
Jul 2, 31 °C
Jul 3, 31 °C
Jul 4, 29 °C
Jul 5, 22 °C
Jul 6, 23°C
Jul 7, 27°C
Jul 8, 28°C
Jul 9, 28°C
Jul 10, 23°C
Jul 11, 24°C
Jul 12, 22°C
Jul 13, 28°C
Jul 14, 29°C
Jul 15, 31°C
Jul 16, 34°C
Jul 17, 33°C
Jul 18, 28°C
Avg = 27.8°C
2007 High Temps July 1 - 18
Jul 1, 20°C
Jul 2, 23°C
Jul 3, 25°C
Jul 4, 19°C
Jul 5, 27°C
Jul 6, 28°C
Jul 7, 31°C
Jul 8, 26°C
Jul 9, 34°C
Jul 10, 31°C
Jul 11, 27°C
Jul 12, 26°C
Jul 13, 22°C
Jul 14, 19°C
Jul 15, 24°C
Jul 16, 24°C
Jul 17, 25°C
Jul 18, 28°C
Avg. = 25.5°C
I'm sure the same stats would prove true for June 2006 vs. 2007. I stand by my comments, this summer has been chilly thus far. Let's wait until the end of September to review the complete summer vs. previous years, but IMO we're in for a non-Gore'ish cold spell this summer.