Snow!!

Snow!!
[It was later found that the thermometers may have given inaccurate readings, so these readings are suspect. DD.]I have planted 10 Mini Cone Greenhouses so far and this morning woke up to snow.
Inside temperature around noon was +21 C and 86 RH
There was condensation on the underside of the lid.
The Minimum overnight temperature was +19 C
There had been snow so outside and minimum local outside temperature was = 0 C.
The Maximum previous daytime temperature inside was +21 C
The maximum outside temperature was +2 C