Open circuit voltage is _very much_ widely considered to be the maximum. If its not spec'd openly as " at temp X" then it's reasonable to expect it to be invariant.
"Voc 37v @ 25*C"
Vs
"Voc 37v"
Edit: Isc is the same- max current.
"Voc 37v @ 25*C"
Vs
"Voc 37v"
Edit: Isc is the same- max current.
E.g. choosing a random Jinko datasheet: https://jinkosolarcdn.shwebspace.com/uploads/JKM600-625N-66H...
V_OC is specified at both STC and NOTC, and the datasheet clearly states which environmental conditions accounted for in those test conditions.