The local METARs were MVFR this morning. But the TAF for Paine Field forecast that it would improve in the early afternoon. At about 12:30, I looked outside, saw that it was indeed getting better, and decided today would be a good day to go flying. And indeed it was. By the time I took off, the weather had improved to full VFR. While I was in the air, the ceiling pretty much disappeared, with only scattered clouds at about four or five thousand feet. It was a lovely flight, and I'm really glad I went up today. I stayed relatively close to Harvey Field. I flew out the Snoqualmie River valley to Fall City and Snoqualmie Falls. I flew back and then basically buzzed around the sky at 3000' for a while. After that, I headed back in to Harvey Field, descending to pattern altitude to enter the 45 for runway 15. As I was entering the 45, another plane (possibly a student pilot, as the plane belongs to the flight school) kind of cut in front of me. I could probably have made room but I ...