September is the month of summer\u2019s last fling and winter\u2019s first beckoning, a time when the thermometers might hit 90, yet when you could find the first frost on your lawn. September\u2019s average high temperature is 74, and low, 50, a range that many would consider just about ideal. But records for the past 25 years show September\u2019s possibilities for extremes: 100 and 23 degrees. The average first frost here is around Sept. 22, the same day this year on which autumn arrives. September has also been a dry month, averaging only 3.8 inches of rain over the past two decades or so, one inch less than August or July, or even November. It also has averaged fewer rainy days than any other month \u2013 just six. While that dryness may desiccate lawns and strain wells, September\u2019s weather is about the best that our part of the world has to offer. Many sunny days that are crisp, yet mild, make for great times outdoors. No wonder the Mohawks called September\u2019s full moon Seskhoko-wa \u2013 \u201ctime of much freshness.\u201d\u2014J.S.