暑中

1. Origins, structure, and basic meaning

• Structure: 暑中, read しょちゅう, combines heat with the sense of being within that seasonal period.
• Basic usage: It is a relatively formal noun for the hot midsummer period.

2. Common pitfalls and similar expressions

• Modification with 暑中の
  • 暑中の工事 means construction carried out during midsummer; it does not describe construction itself as hot.
• Time range in 暑中にも
  • 暑中にも means even during the midsummer heat. The 中 here belongs to a seasonal time expression, not a location.