Just because the seasons have changed, it doesn't mean you have to limit your dates to dinner and a movie. Get outdoors, be adventurous and enjoy the romantic backdrop that fall creates.
Late September through October is always the best time for picking fresh apples, and while the idea of dating at an orchard may seem primitive, it's actually quite beautiful. Whether it's a first date or you're well into the relationship, this is a time to roll up your sleeves and show your date that you're up for anything. If things go well, you can always extend the date by suggesting that you bake apple pie or make caramel apples together afterward. Go to pickyourown.org for a list of local farms.
If you want to get his heart racing, consider going to a haunted house. You can both get lost in a spooky labyrinth of ghosts and goblins. Plus, it's always nice to have someone to hold on to when you're scared of what's lurking in the shadows. Hauntworld.com has a good list of houses near you.
Going out to dinner is always nice, but if the weather is tolerable, take your meal outside. Head to your favorite campground or local beach and find a fire pit (bonfires can be unsafe and are illegal in some areas) where the two of you can cozy up. Enjoy a picnic-style meal or just roast marshmallows, share a blanket and toast hot cocoa while enjoying the nostalgic scent of burning wood.
If you're concerned that sifting through piles of vegetables might not sustain your interest, many patches have corn mazes, hayrides, and other festive activities to keep you entertained. Similar to apple picking, visiting a pumpkin patch can act as a catalyst for a second rendezvous: If you want to see your date again, then suggest getting together to carve your newly-purchased pumpkin or bake pumpkin-spice bread.