Ok, in SE PA its been raining for the past week and a half.  Two days out of the 10, I noticed a problem with the legacy.   
  
Both times, I started the car, it started up and idled fine.  I put it in drive, and started to leave my neighborhood.  I didn't let the car warm up either time.  About half way up the hill coming out of the neighborhood, I noticed something wrong.  The car was hesitating pretty badly.  From a stop sign on the hill, I could barely get up the hill.  the first time it happened, I got to the top, and was about to turn around....I drove maybe 3/4 of a mile.  I tried to stay off the gas, because I didnt want to flood the engine.  well it seemed to correct itself.  The second time I got about 2 miles away, and it was still happening.  I got off the off ramp, sat at a light for about 2 minutes to turn around, and again it corrected itself. 
  
First I thought the auto tranny was going, but the engine wasnt racing...no slippage.  Then I thought there could be some moisture in teh fuel from all the rain.  I was also thinking that maybe its the sparkplugs are going and it wasnt firing on all cylinders.  I'm no expert, so I need some opinions. 
  
Can anybody offer some insight to waht the problem is?  Thanks in advance! 
  
-Bill