NRF estimates 3.4% of all retail sales are directly impacted by yearly weather changes — ~$1 trillion USD annually

Claim: The National Retail Federation "estimates that 3.4% of all retail sales are directly impacted by yearly weather changes, amounting to approximately $1 trillion USD in sales, annually," and calls weather "the least understood, least measured, and least acted upon external factor" in retail.

Source: NRF, via Retail Brew, October 2024.

Confidence: Verified (NRF figure repeatedly cited).

Caveat: Industry-association source; the underlying methodology behind the 3.4% / $1T figures is not surfaced in the Retail Brew piece. Treat the direction as robust, the magnitude as a working benchmark not a precision claim.

Why this matters for Candid: Cleanest single number for the "weather data has real retail impact" case in client conversations. Pair with the peer-reviewed Peer-reviewed Canadian retailer study — adding weather data explained up to +47% of variance for individual products, +56% for product categories for academic backup.