First Freezing Temperature Of Fall

Just a quick update - morning low temperatures did fall to freezing and below here in the north side of the City of Tucson, along the Rillito. The low at the house was 30 F, bringing out my winter hat for the morning walk. Yesterday the low ended up at 35 F, falling two degrees after I had read it prematurely. Quite a few lows in the 20s along the San Pedro and Empire RAWS station was at 29 F - coldest I noted was again at the Columbine RAWS on Mt. Graham with a cold 18 F.