Costco Hours: Tuesday, July 4, 2017 by Rhonda July 16, 2020 374 7/4/17. Happy 4th of July! Costco will be closed today. 0 FacebookTwitterPinterestEmail previous post Costco Sale: The Original Green Pan 2-Pk Ceramic Skillets $31.99 next post Costco Sale: Water Sports Stream Machine 2-Pk $9.99 You may also like Yardistry 12′ x 14′ Contemporary Gazebo – Costco... Costco Sale: Ninja NeverClog Cold Press Juicer Totally Bamboo Destination Washington Cutting Board at Costco! Costco Unadvertised Sales! APRIL 2024 Costco In-Warehouse Hot Buys Sale: APRIL 2024 Happy Easter!