For an ensemble that's pared-down but can be worn in a great deal of different ways, consider wearing a navy hoodie and charcoal chinos. Complement your outfit with a pair of black suede desert boots to switch things up.
Navy Hoodie with Charcoal Chinos Smart Casual Warm Weather Outfits
If you don't like trying too hard ensembles, dress in a navy hoodie and charcoal chinos. Complete your look with a pair of white leather low top sneakers for maximum style points.