MIT probabilistic forecast
MIT Probabilistic Forecast for 21st Century Climate Based on Uncertainties in Emissions (without Policy) and Climate Parameters.
Source: MIT (January 2009 - via Dan Miller)
The MIT report suggests that in a business-as-usual ("no policy") scenario, there is a 50% chance that the temperature will be 5ºC (9ºF) or more warmer in 2095 – and a 95% chance that it will be 3.5ºC (6.3ºF) or more warmer in 2095.