3 days and 3 workouts

Is it really only Wednesday?! It seems like every week I start out with lots of energy and enthusiasm and kick-ass during my workouts. But by Thursday I'm completely out of steam. This week is no exception. I think tomorrow will have to be a rest day.
My workouts so far:
Monday - speed drills
Warm up - 1.5 mi jog
7 x 400m (1min rest btwn) These were done at pace, meaning 1/4 of the mile time trial I did 3 weeks ago. I did all of them 8-17 seconds faster than pace. Go me. 
Cool down - 1.5 mi jog home
Tuesday - 35 min swim
Warm up - 150m slow (50m freestyle, 25m breaststroke, repeat) 
Ladder - 100m, 200m, 300m, 300m, 400m, 400m (~30sec rest between)
Cool down - 25m freestyle, 25m breaststroke (both pretty slow)
Today - 50min run.  I was supposed to go to the gym to lift weights and use some cardio machines today. But the weather forecast says rain is on the way so I wanted to take advantage of the clear skies while I could. I didn't plan a route or anything, just left the house and ran. I love runs like that! 


Up-coming weather:
 
I think I'll be modifying my weekend workout plan. I hate running or biking in the rain! 
Anyone have any advice for how to keep motivated when the weather turns to shit and all you want to do is curl up and watch a movie?? Leave me a comment!