91907 Springfield 36cm . Clock with Inset Thermometer in a Decorative Black Frame, for Indoor/Outdoor Use. The 36cm Outdoor Clock and Thermometer Line is a standard of the industry. Easy to read dials with large, bold numerals. The Silk Screened graphics are bold in design and graphics. The Patio Dial line is weatherproof and shatter resistant. They measure temperatures accurately from 60 F to 120-Degree F plus a quartz clock movement.