The following chart plots the average performance of the FTSE 100 Index during February since 1984 (more info on this type of chart).
As can be seen, historically the market has generally risen for the first two and a half weeks of February, and then fallen back a little in the final week and a half.
January 2014
The following chart shows the average performance of the market in January (1984-2013) and overlays the actual performance in January 2014.
In January 2014 the big difference from the average January was the big share sell-off in the final week and a half.