Not sure which regs you're working under? With EASA if its in the MOE you can do it,but with the caveat that;
"the working environment for line maintenance is such that the particular maintenance or inspection task can be carried out without undue distraction. Therefore where the working environment deteriorates to an unacceptable level in respect of temperature,moisture, hail, ice, snow, wind, light, dust/other airborne contamination, the particular maintenance or inspection tasks must be suspended until satisfactory conditions are reestablished.
EASA 145.A.25.(c) 6