Great study by Hank Jenkins-Smith & collaborators showing that (a) perceptions of recent local weather predict belief in climate change but that (b) cultural worldviews more powerfully predict individuals' perceptions of recent local weather than does the actual recent weather in their communities.
The basic lesson of cultural cognition is that one can't quiet public controversy over risk with "more evidence": people won't recognize the validity or probative weight of evidence that is contrary to their cultural predispostions.
Why should things be any different when the "evidence" involves "recent weather"?
What will those who are pointing to the current (North American) heat wave say if it's cooler next summer (it almost certainly will be; regression to the mean), or the next time we get a frigid winter? Probably that it's a mistake for individuals to think that they are in a position to figure out if climate change is happening by looking at their own thermometers (it is).
There's really only one way to fix the climate change debate: fix the science communication climate so that people with opposing values are no longer motivated to fit the evidence to their cultural predispositions.
Goebbert, K., Jenkins-Smith, H.C., Klockow, K., Nowlin, M.C. & Silva, C.L. Weather, Climate and Worldviews: The Sources and Consequences of Public Perceptions of Changes in Local Weather Patterns. Weather, Climate, and Society (2012), doi: http://dx.doi.org/10.1175/WCAS-D-11-00044.1.