Cheap Lee Valley Window-Mount Thermometer

With a large face and easy-to-read markings on the dial, this window-mounted thermometer lets you read the outdoor temperature at a glance, without having to step outside.

The central hub has a weatherproof peel-and-stick adhesive backing for easy installation. With a 4 1/4″ diameter acrylic dial marked in Celsius and Fahrenheit, the thermometer doesn’t require batteries, operating on a simple, reliable bimetal strip that is accurate from -40°F/°C to 122°F/50°C.

Economical and effective.