We won't be beaten
To save you time
Click for next day
Record the outdoor temperature from the comfort of the classroom.
The large version has a plastic dial that ‘clings’ to the outside of the glass and the small version has an adhesive pad. Both provide a very clear reading.
At least so far ... it has only been out for a couple of days, so I don't know how well it will withstand the wind and rain and temperature extremes.