  The first measurement of the temperature dependence of the muon transfer rate
from muonic hydrogen to oxygen was performed by the FAMU collaboration in 2016.
The results provide evidence that the transfer rate rises with the temperature
in the range 104-300 K. This paper presents the results of the experiment done
in 2018 to extend the measurements towards lower (70 K) and higher (336 K)
temperatures. The 2018 results confirm the temperature dependence of the muon
transfer rate observed in 2016 and sets firm ground for comparison with the
theoretical predictions.
