References 479% CONFIDENCEOverall confidence: 79%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]75%costco.com/f/-/new-opening-amherstcostco.com· Posted Sep 21, 2026· Starts Oct 28, 2026 ✓· 24% of score
Costco's own new-opening page for the site carries the date, reported as opening "on October 28, 2026".
- [2]80%Costco now expects to open in Amherst in the fallwkbw.com· Added Oct 25, 2026· 28% of score
Buffalo ABC affiliate on the Ridge Lea Road site, the 2022 announcement and earlier delays.[1]
- [3]75%Costco is Opening 5 New U.S. Warehouses in Octobersuburbs101.com· Added Sep 21, 2026· 24% of score
Collects the October 2026 opening dates Costco[1] has confirmed store by store.
- [4]85%Costco opening Oct. 28 in western New Yorkretailcustomerexperience.com· Published Sep 10, 2026· 23% of score
Trade report confirming the Oct. 28 date, the pre-opening gas pumps, the Walden Galleria membership storefront and the other October openings.[1]
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