Winterizer should go down after the grass stops growing but before the ground freezes. Are you still mowing? If you haven't mowed for a couple of weeks and have put your mower away for the season, go ahead. You want a quick release, high nitrogen fertilizer and your 32-0-10 may work fine. Water it in or put it down just before rain.

Wouldn't the moisture from nightly dew and frost actually perform the "water it in" for you ... over the course of several days?

>>Wouldn't the moisture from nightly dew and frost actually perform the "water it in" for you ... over the course of several days?

Alas, no, it just dampens it down. Over time (in late fall, quite a lot of time on most soils) that would eventually lead to a loss of nitrogen to the air from a urea- or ammonia-based fertilizer.

It's not much of a concern in colder temperatures unless the time between application and rainfall is really ridiculously long.

thank you all for the comments

For other applications in the year, dew is a problem. When the only moisture available is dew, the concentration of salty fertilizer in the dew drops is too strong and can damage the plants. If you wash it in before the dew strikes, the salt solution is diluted enough that no damage will occur. It doesn't take much water - just more than dew.