I'd agree with what the others are saying.
I got a few problems with water in my oil after having the valve cover off for a few weeks in some wet weather. Having just replaced the waterpump oil seal though I had more reason to be worried.
The advice I was given was privided there was not a lot of mayonaise like stuff in my oil was to take it for a long ride, get it hot and boil it out.
I put fresh oil in from a sealed container which seemed to be better than the old stuff too. After a few hundred miles it appears to have cleared its self out.
I'm told its quite common to get condensation in the winter and it tends to be drawn to the window. Also idling etc can do this.
I'm guessing as you have not posted back in the last week all is ok anyway
30s is just about freezing isn't it for those of us who were brought up in metric?