Dear Kadence,
This is Abby from Topchinatravel. Thank you for paying attention to our website. About your question for Mt. Everest, the coolest temperature is around -36 ℃ and the warmest is about -18 ℃. Hope this answer will help you.
If you're interested in Mt. Everest tour, you can join our group tour,
8 Days Tibet Group Tour to Mt. Everest Base Camp, including Lhasa, Shigatse, Tingri, Mt. Everest Base Camp. Or you can tailor-made your personal tour on Top China Travel. We're so happy to be your partner.
Any further request or question, please feel free to contact with us.
Have a good day!
Warm Regards,
Abby from TCT