Radishes growing slow 5/29/13

Radishes normally grow pretty fast but when conditions are not quite right they slow down.  Perfect case is my radishes I planted this year.  In optimal conditions the radishes should only take 22-23 days to mature to harvest.  I planted the seeds on May 6th so today would have been a day to harvest, however my plants are still small.  I think it's due to the cool and wet conditions lately.  Even though radishes are a cool spring plant and fall plant, the conditions this spring have been pretty nasty! Hopefully things will change in the coming weeks! 

The radish plants should be close to 6 inches high, they're barely bigger than newly sprouted radish seeds!