Planning what to wear to an October wedding? These 20 fall wedding guest dresses are perfect for formal ceremonies, rustic country weddings, outdoor garden parties, or cozy Western-style celebrations. From rich hues like navy blue, rust, and forest green to flattering silhouettes for curvy women, you’ll find gorgeous outfit ideas that fit both elegant and casual settings. Ideal for 2025 weddings with crisp air and beautiful backdrops.