I have found a really interesting site; North America Climate Extremes Monitoring from NOAA Sattlitte and Information Service.
It allows extreme climate data to be mapped. As it suggests it is rather limited to the North American area but it is interesting to see the decrease in frost days;
|Trend - Frost free days|
Increases in things such as summer days,
|Trend - Summer days|
|Trend - Growing season|
Intensity of rain/snow fall
|Trend - Intensity of rainfall|
And of course temperatures.
|Trend - Temperatures greater than the 90th percentile|
The data only goes from 1950 up to 2006 but I suspect that the situation has not improve over the last 5 years. All indicators of an anthropologically warming world - no models required.