3x Gorilla Haze outdoor in Germany

For the period of nearly a week, the weather was literally freezing cold. At night we got temperatures of -3 degree celsius and during the day we got 8 degree celsius at best. My grow was nearly ruined, as I left my plants outside while I wasn't at home for one day. On the next morning the plants showed signs of extreme sunburn, which must be caused by the extremly low temperatures, that messed up the plants function to handle direct sunlight. The plants are now back on the windowsill to regenerate.