In 1981-2010 period,
Horasan had a 0.8°C colder daily mean than provincial capital in coldest month.
Horasan had a daily mean of -10.9°C in coldest month
Provincial capital had a daily mean of -10.1°C in coldest month
https://www.mgm.gov.tr/iklim/iklim-s...aspx?m=HORASAN
https://www.mgm.gov.tr/iklim/iklim-s...aspx?m=ERZURUM
In 1991-2020 period
It appears that both of them have a coldest month daily mean of -10.2°C.
Horasan warmed up by 0.7°C in coldest month daily mean
Provincial capital cooled down by 0.1°C both in coldest month daily mean and average low
All except for provincial capital warmed up in coldest month daily mean