diff --git a/lib/towerops/snmp/profiles/vendors/routeros.ex b/lib/towerops/snmp/profiles/vendors/routeros.ex
index 23fbac0f..d3191e8f 100644
--- a/lib/towerops/snmp/profiles/vendors/routeros.ex
+++ b/lib/towerops/snmp/profiles/vendors/routeros.ex
@@ -606,8 +606,8 @@ defmodule Towerops.Snmp.Profiles.Vendors.Routeros do
   end
 
   # Map mtxrGaugeUnit value to sensor type, unit string, and divisor
-  # Based on LibreNMS routeros.yaml - temperature is in whole degrees, voltage/current/power in deci-units
-  defp gauge_unit_to_sensor_type(@gauge_unit_celsius), do: {"temperature", "°C", 1}
+  # Mikrotik reports temperature in tenths of degrees (e.g., 230 = 23.0°C)
+  defp gauge_unit_to_sensor_type(@gauge_unit_celsius), do: {"temperature", "°C", 10}
   defp gauge_unit_to_sensor_type(@gauge_unit_rpm), do: {"fanspeed", "RPM", 1}
   defp gauge_unit_to_sensor_type(@gauge_unit_dv), do: {"voltage", "V", 10}
   defp gauge_unit_to_sensor_type(@gauge_unit_da), do: {"current", "A", 10}
@@ -646,7 +646,7 @@ defmodule Towerops.Snmp.Profiles.Vendors.Routeros do
 
   # Sensor type configurations for overrides (must match gauge_unit_to_sensor_type divisors)
   defp sensor_type_config("voltage"), do: {"voltage", "V", 10}
-  defp sensor_type_config("temperature"), do: {"temperature", "°C", 1}
+  defp sensor_type_config("temperature"), do: {"temperature", "°C", 10}
   defp sensor_type_config("current"), do: {"current", "A", 10}
   defp sensor_type_config("power"), do: {"power", "W", 10}
   defp sensor_type_config("fanspeed"), do: {"fanspeed", "RPM", 1}
diff --git a/priv/repo/migrations/20260131181404_fix_mikrotik_temperature_sensor_divisor.exs b/priv/repo/migrations/20260131181404_fix_mikrotik_temperature_sensor_divisor.exs
new file mode 100644
index 00000000..e29632d1
--- /dev/null
+++ b/priv/repo/migrations/20260131181404_fix_mikrotik_temperature_sensor_divisor.exs
@@ -0,0 +1,36 @@
+defmodule Towerops.Repo.Migrations.FixMikrotikTemperatureSensorDivisor do
+  use Ecto.Migration
+
+  def up do
+    # Update Mikrotik temperature sensors (from gauge table) to use divisor 10
+    # Mikrotik reports temperature in tenths of degrees (e.g., 230 = 23.0°C)
+    # Match by OID pattern: 1.3.6.1.4.1.14988.1.1.3.100.1.3.* (gauge table)
+    execute """
+    UPDATE snmp_sensors
+    SET sensor_divisor = 10
+    WHERE sensor_type = 'temperature'
+      AND (
+        sensor_index LIKE 'mikrotik_gauge_%'
+        OR sensor_oid LIKE '1.3.6.1.4.1.14988.1.1.3.100.1.3.%'
+      )
+      AND sensor_divisor = 1
+    """
+
+    # Note: Optical table sensors (1.3.6.1.4.1.14988.1.1.19.1.1.6.*)
+    # correctly use divisor 1 and are not affected by this migration
+  end
+
+  def down do
+    # Revert to divisor 1 (incorrect, but reversible)
+    execute """
+    UPDATE snmp_sensors
+    SET sensor_divisor = 1
+    WHERE sensor_type = 'temperature'
+      AND (
+        sensor_index LIKE 'mikrotik_gauge_%'
+        OR sensor_oid LIKE '1.3.6.1.4.1.14988.1.1.3.100.1.3.%'
+      )
+      AND sensor_divisor = 10
+    """
+  end
+end
diff --git a/test/towerops/snmp/profiles/vendors/routeros_test.exs b/test/towerops/snmp/profiles/vendors/routeros_test.exs
index b6158ffa..fb69e2dc 100644
--- a/test/towerops/snmp/profiles/vendors/routeros_test.exs
+++ b/test/towerops/snmp/profiles/vendors/routeros_test.exs
@@ -283,10 +283,10 @@ defmodule Towerops.Snmp.Profiles.Vendors.RouterosTest do
            %{oid: "#{@gauge_table}.2.1", value: "psu-voltage"},
            %{oid: "#{@gauge_table}.3.1", value: 469},
            %{oid: "#{@gauge_table}.4.1", value: 3},
-           # CPU Temperature: raw value 45, unit type 1 (celsius) -> should be 45°C
-           # LibreNMS shows Mikrotik temperature values are in whole degrees, not deci-degrees
+           # CPU Temperature: raw value 450, unit type 1 (celsius) -> should be 45.0°C
+           # Mikrotik reports temperature in tenths of degrees (divisor 10)
            %{oid: "#{@gauge_table}.2.2", value: "cpu-temperature"},
-           %{oid: "#{@gauge_table}.3.2", value: 45},
+           %{oid: "#{@gauge_table}.3.2", value: 450},
            %{oid: "#{@gauge_table}.4.2", value: 1}
          ]}
       end)
@@ -305,12 +305,12 @@ defmodule Towerops.Snmp.Profiles.Vendors.RouterosTest do
       assert voltage_sensor.last_value == 46.9
 
       # Find the temperature sensor
-      # LibreNMS shows Mikrotik temperature values are in whole degrees (divisor 1)
+      # Mikrotik reports temperature in tenths of degrees (e.g., 450 = 45.0°C)
       temp_sensor = Enum.find(sensors, &(&1.sensor_descr == "cpu-temperature"))
       assert temp_sensor
       assert temp_sensor.sensor_type == "temperature"
       assert temp_sensor.sensor_unit == "°C"
-      assert temp_sensor.sensor_divisor == 1
+      assert temp_sensor.sensor_divisor == 10
       assert temp_sensor.last_value == 45.0
     end