Walmart offers the La Crosse Technology Digital Atomic Clock / Thermometer, model no. 513-149-INT, for $29.86. (Amazon has it for the same price with free shipping for Prime members.) Choose in-store pickup to dodge the $4.97 shipping fee. That's tied with our March mention and the lowest price we could find now by $6, excluding the below mention. It features automatic self-setting time, automatic Daylight Savings Time reset, and indoor and outdoor temperature.
A close price: Home Depot has it for $30.76 via in-store pickup.