The request might have gotten more, quicker answers if in Classic Menswear.
Chinos for the field, probably with a light blue dress shirt. Textured sportcoat maybe, albeit not in hot weather.
For an indoor city meeting, a regular sportcoat, white dress shirt, dress shoes, and chinos or wool pants.
Obviously, if meeting a few hours apart, some compromises are advisable, say, dark brown split-toe bluchers instead of standard dress shoes.