Min / Max temp range

Has anyone seen the min max temp operating range for the MKR ?

Need to mount one in a small plastic box OUTSIDE my garage.

Reason for outside is that whilst everything else wireless works inside the garage the range on the MKR is quite limited and outside high on a semi sheltered wall is the only location it works.

Don't currently have an extender but for this application it may not do too much good as I want to measure the environment outside but close to the garage. Temps, wind chill, wind direction etc.

MKR itself will be protected against the elements and I may even add some insulation to it if needed.

Possibility of going down to MINUS 40 C / 50 C with wind effect.