Common places to hang a large outdoor thermometer are on patios, decks, in gardens and on exterior house walls. Place the thermometer in full sunlight to obtain an accurate reading.
Hang the thermometer from a nail with a string on brick or metal surfaces. For wood surfaces, nail the thermometer directly onto the surface or stick the thermometer in place with strong epoxy glue. Alternatively, hang the thermometer on the porch columns or from a metal post on the patio. Attach the outdoor thermometer to a garden alcove in direct sunlight or nail the thermometer to the garage back door. Hang the thermometer from a pole fixed to an outdoor dining table.