5 Things to Do in St. Charles, Missouri This September

September in St. Charles is one of the best times of year to get out and enjoy everything our community has to offer. The weather starts to cool down, the kids are back in school, and the first hints of fall are in the air.

Whether you're looking for a little self-care, an evening with friends, local shopping, or a reason to get outside, there is plenty to do around St. Charles this September.

Here are five of our favorite ways to enjoy the month.

1. Treat Yourself to Some Much-Needed Self-Care at Rainforest Head Spa

Now that the kids are back in school, it is officially time to put a little time back on your own calendar.

If you've been looking for a relaxing way to reset this September, check out the brand-new Rainforest Head Spa in Cottleville, located at 5055 State Route N, Cottleville, MO 63304.

Rainforest Head Spa recently opened its second St. Louis-area location, bringing its signature head spa experience to St. Charles County. Guests can enjoy a luxurious, multi-step experience focused on relaxation and scalp care, including a relaxing head, neck, and shoulder massage, personalized scalp treatments, facial massage, hydro-fall water therapy, and a finishing blow-dry.

Whether you are a busy mom enjoying your first quiet afternoon after school starts, planning a girls' day, celebrating a special occasion, or simply ready for some uninterrupted relaxation, a head spa is the perfect way to start your September reset.

If you've been searching for a head spa near St. Charles, Japanese head spa near me, scalp massage near me, or head spa in Cottleville, Rainforest Head Spa is right in your backyard.

2. Spend a Fall Evening at Frankie Martin's Monday Markets

Looking for that perfect early-fall evening?

Head to Frankie Martin's Monday Market for live music, local vendors, food, and plenty of opportunities to shop small. It is an easy way to spend an evening with friends while enjoying the transition from summer into fall.

Browse local makers, discover something new, grab something to eat, and enjoy live music while supporting small businesses in the community.

The market takes place on the last Monday of the month through November, making it a great addition to your fall calendar.

Whether you're trying to fall in love with local or simply looking for something fun to do on a Monday night, this is an easy way to enjoy the St. Charles community.

3. Take a Stroll Down Historic Main Street

There is a reason Historic Main Street is one of St. Charles' most beloved destinations.

Take a leisurely walk along the brick-lined streets, browse the locally owned shops, pop into a restaurant, and enjoy the historic architecture. September is an especially beautiful time to spend an afternoon or evening exploring the area as the temperatures begin to cool down.

And while you're there, make sure to stop into one of the many unique local coffee shops. Picasso's Coffee House is a great place to grab a coffee and take a break before continuing your stroll.

Historic Main Street is also a great starting point for a full afternoon in downtown St. Charles. You can easily turn your walk into a day of shopping, coffee, lunch, and exploring.

4. Experience the Mosaics Fine Art Festival

If you love art, September is a great time to visit St. Charles.

The Mosaics Fine Art Festival brings talented artists together along Historic North Main Street for a weekend filled with original artwork, creative vendors, and plenty to explore.

The festival is a free, family-friendly juried fine art event held each September, making it an easy activity to add to your weekend plans.

Spend the afternoon walking through the festival, meeting artists, shopping for something unique, and enjoying everything Historic Main Street has to offer while you're there.

It is the perfect combination of art, shopping, food, and the charm that makes St. Charles such a fun place to explore.

5. Shop Vintage at Vintage Market Days

Ready to start decorating for fall or looking for something completely unique?

Make plans to visit Vintage Market Days at the St. Charles Convention Center from September 18–20, 2026.

This three-day shopping event features more than 130 vendors offering vintage finds, antiques, clothing, jewelry, handmade treasures, home décor, seasonal items, and more.

Whether you're a serious vintage shopper or just love discovering unique pieces, it is a fun way to spend a fall weekend browsing local and traveling vendors.

Make the Most of September in St. Charles

September is the perfect time to slow down and enjoy your own community. Between local markets, historic Main Street, art festivals, vintage shopping, and a little well-deserved self-care, there is no shortage of things to do in St. Charles this fall.

And if your September calendar is already filling up with school activities, work, sports, and everything else life throws your way, don't forget to schedule something just for you.

Visit Rainforest Head Spa's Cottleville location at 5055 State Route N and experience a little relaxation from the roots up.

Looking for a head spa in St. Charles County, head spa in Cottleville, or Japanese-inspired head spa near St. Charles? Rainforest Head Spa has two convenient locations in the St. Louis area, with our original location in Ellisville and our newest location in Cottleville.

September is for getting back into a routine, enjoying the changing season, supporting local businesses, and making a little more room for yourself.