Costco Closed on July 4, 2020 by Rhonda February 4, 2021 400 7/4/20. Happy Independence Day! Costco will be closed today. 0 FacebookTwitterPinterestEmail previous post Nuwave Brio 6-Qt Air Fryer – Costco Sale! next post Cuisinart Custom Select Toaster-Costco Sale! 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!