weather germany sept 10 - oct 24

Weather- Mild to cool. I doubt you'll see a temperature less than 10 C. Koblenz- the area around the main shopping street was completely rebuilt in an unattractive style after the war, but overall, I think the town gets a bad rap. It has it's ugly area, but most of the town is rather attractive.

It'll be colder than Florida. Bring a rain coat, possibly gloves and scarf (or buy those here). Layering is the key to dressing appropriately.

thank you, tom and cathy. am glad weather is tolerable and koblenz is not bad. koblenz will be our base for 5 nights. we will be visiting the st.goar side and trier side.

Um, the nighttime low right NOW is 7 C, it would not be unheard of in late October for nighttime temps to be in the 30 F. Fall is a nice time weatherwise, probably less rainy than spring, but it will be cold in the evenings in October, so plan on that.

EDIT- I meant you are very unlikely to see daytime HIGHS below 10. The majority of temperatures you will experience will be significantly higher.

In the past couple of years our Septembers and Octobers have been the nicest months. Temperatures have been in the 70s and it's been sunny and mostly dry.

It's also worth noting the OP is from Florida, her idea of "cold" may be higher temps than what others might. My MIL from LA found summer to be cold here!

You never really know, and averages can be deceiving - a person with their head in the oven and feet in a bucket of ice is, on average, comfortable. My experience is that September is normally a great month, nice days and chilly nights. I'm usually wearing short sleeves in the day and a light jacket or sweater in the evening. October is different. It starts out like September, but somewhere around the middle of the month turns cold (somewhere could be the 10th or the 20th). When it gets cold, you will be wearing a light jacket or sweater (probably both) during the day, and want even warmer clothing at night. One trip, our pictures showed us wearing short sleeves in Koln during early October, then wearing scarves, gloves and ski caps (that we picked up at a Munich department store) by the 14th - it was in the 30's (f), but that was considered unseasonably cold.

"koblenz is not bad. koblenz will be our base for 5 nights.... we will be visiting the st.goar side and trier side." It's probably better to spend 2-3 nights in St. Goar (or another Rhine village) and 2-3 nights on the Mosel River. Cochem is a good base there. Koblenz is not a horrible place, but the area near the station is an exercise in concrete and generally uninspiring, and it's a long walk or a bus ride from the old town area (a more attractive place to stay) through lots of traffic and a modern shopping area to the station if you're planning to do outings to other places by train. The time you spend getting to the station and back within Koblenz could just as easily be spent on a Rhine or Mosel River train ride from one of the neighboring villages; some of these towns hold wine festivals in September and offer much more old-world atmosphere than Koblenz. St. Goar is 30 min. from Koblenz by train. Boppard is 15 min. from Koblenz.
Braubach, home of Marksburg Castle, is 11 min. from Koblenz. If you stay in any of these villages or in Koblenz, there's a 3-day train/bus pass that gets 2-5 people around for 40€ - the VRM mini-group ticket; it's good south to Oberwesel, north to Remagen, and west along the Mosel to Cochem and Bullay. A one-day verion costs 20€: http://www.vrminfo.de/en/tickets-and-fares/ticket-offers/leisure-ticket/ The Rheinland-Pfalz Ticket would be better for longer journeys from this area - you can go as far as Karlsruhe to the south, Bonn to the north, and to Trier and Saarbrücken to the west. http://www.vrminfo.de/en/tickets-and-fares/ticket-offers/rheinland-pfalz-ticket/

thank you, all. we are better prepared now. i will think of the possibility of cutting our stay half on the rhine and half on the mosel. thanks.

I should have also added Koblenz wouldn't be my first choice for a place to stay along the Rhine - nothing special is how I would describe it.