Question

What is the coldest temperature ever recorded in the observant universe until now?

Answer 1

Thanks for your effort but I got the answer In space, coldest temperature is recorded in Boomerang Nebula which is lesser than temperature of space itself

Answer 2

The coldest temperature ever recorded in the observable universe was in Helsinki University in 1999, where a record `1 xx 10^-10` K (`100` pico Kelvins) was achieved.

Explanation:

The average temperature of the universe is about `2.73`K

The coolest naturally occurring temperature that we have observed is `1`K in the Boomerang Nebula, caused by about `1,500` years of releasing gases at high speed.