For what it's worth, I do expect fall to arrive earlier this year. Overall, our summer has been cooler and wetter than normal, following last year's extreme heat and drought. Gives credence to the "global cooling" reported by some over the last 15 years.
I am also a weather junky, always aware of weather forecasts. If weather is trending cooler than normal fall changes, I take my cuttings.
Some tips:
When taking cuttings, walk around with a bucket of cool, soapy water and toss each cutting in, swish the cutting around. That probably helps hydrate the cutting as well as killing or removing bugs before they get into the house. I also add a little systemic insecticide to each cup of soil before I stick the cutting.
Karen