There's definitely a bunch in Mongolia, and lots in Russia.
Kyzyl in Siberia has 49.2C (20.5/-28.7)
Ulaangom is relatively close to Kyzyl and is 51.0C (18.9/-32.1)
Yakutsk 58.1 (19.5/-38.6)
Mohe, China just misses it. 47.9 based on the lows and 47.3 based on the highs.
Looking at
Vostok with 35.9 degrees and the south pole also nowhere close I don't know of anywhere in Antarctica that would make it.
There might be somewhere in North America, but I can't find a place.
Eureka, Nunavut 43.5 (6.1/-37.4)
Fort Yukon, Alaska 45.2 (16.7/-28.5)
Baker Lake, Nunavut 42.9 (11.6/-31.3)
Old Crow, Yukon 43.8 (14.6/-29.2)
Rae Lakes/Gamèti, Northwest Territories 43.9 (16.8/-27.1)
Ennadai Lake, Nunavut 44.5
Chalkyitsik, Alaska 48.2 (15.9/-32.3) just makes it. But if you click the link to the source the data was spotty and only between 1962 and 1972, and the average for January is only using five of those years.
Arctic Village, Alaska is 45.7C based on highs and 44.3 based on lows. This one only has about 10 years of data, most of it is the late 80s and early 90s.