At the junction with the road near Cerbia, I went left and up toward Montagnana, and turned off on the back way to San Vincenzo a Torri, a new favorite of mine. I turned left on the main road, then rode over to Ginestra Fiorentina, then turned to go up the hill, turned off toward Marliano, through Marliano, and across the highway. I took the left, and went to Vigliano, then took the climb to Santa Maria a Marciano. Here the climbing was complete, and I descended into Scandicci, then toward Firenze. It was after the hospitals in Scandicci when it started to rain lightly, but the sun came out as well, and I rode straight into a brilliant rainbow back into the city center. Lots of fun. Summary is either 3800 or 5300 vertical (depends on if you enable the correction piece on Garmin, and I don't know which is correct), in 46.5 miles, with 3 hours 40 minutes of rolling time giving an average speed of 12.7 mph. Check the link for more specific information if you wish.
Rainbow tour - changing weather by ridingwithcosimo at Garmin Connect - Details
As the sky cleared, the high clouds confirmed the weather change.
The vineyards in the foreground are going yellow.
Here are a couple of shots of the vineyards in full color change.