Temps were in the mid 40s this morning with a 20-25mph north wind coming right at me. Yesterday I had my chain replaced, only to find out my rear cassette was damaged too. I chose to ride with the new chain until the new cassette arrives Friday.
My nine speed cassette starts "skipping" around in gears 4,5, and 6. All others ride smooth and quiet.
Going into the wind this morning, I had a fun little game of finding the "sweet spot" by shifting up and down in the front three chain rings, and only using gears 1,2,3,7,8,9 in the rear.