diff --git a/src/sim/power/PowerModel.py b/src/sim/power/PowerModel.py
index 2047c645b7..cfbd8cb66e 100644
--- a/src/sim/power/PowerModel.py
+++ b/src/sim/power/PowerModel.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2016-2018 ARM Limited
+# Copyright (c) 2016-2018, 2021 Arm Limited
 # All rights reserved.
 #
 # The license below extends only to copyright in the software and shall
@@ -63,4 +63,4 @@ class PowerModel(SimObject):
     pm_type = Param.PMType("All", "Type of power model")
 
     # Ambient temperature to be used when no thermal model is present
-    ambient_temp = Param.Float(25.0, "Ambient temperature")
+    ambient_temp = Param.Temperature("25.0C", "Ambient temperature")
diff --git a/src/sim/power/ThermalDomain.py b/src/sim/power/ThermalDomain.py
index 3fd5cadbf9..57c53b2910 100644
--- a/src/sim/power/ThermalDomain.py
+++ b/src/sim/power/ThermalDomain.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2015 ARM Limited
+# Copyright (c) 2015, 2021 Arm Limited
 # All rights reserved.
 #
 # The license below extends only to copyright in the software and shall
@@ -46,4 +46,4 @@ class ThermalDomain(SimObject):
     ]
 
     # Static temperature which may change over time
-    initial_temperature = Param.Float(25.0, "Initial temperature")
+    initial_temperature = Param.Temperature("25.0C", "Initial temperature")
diff --git a/src/sim/power/ThermalModel.py b/src/sim/power/ThermalModel.py
index 2894dd8eba..90710e19e0 100644
--- a/src/sim/power/ThermalModel.py
+++ b/src/sim/power/ThermalModel.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2015 ARM Limited
+# Copyright (c) 2015, 2021 Arm Limited
 # All rights reserved.
 #
 # The license below extends only to copyright in the software and shall
@@ -77,7 +77,7 @@ class ThermalReference(SimObject, object):
     ]
 
     # Static temperature which may change over time
-    temperature = Param.Float(25.0, "Operational temperature in Celsius")
+    temperature = Param.Temperature("25.0C", "Operational temperature")
 
 
 # Represents a thermal capacitor
diff --git a/src/sim/power/power_model.cc b/src/sim/power/power_model.cc
index fbc67d34b9..42515ace86 100644
--- a/src/sim/power/power_model.cc
+++ b/src/sim/power/power_model.cc
@@ -66,7 +66,7 @@ PowerModel::PowerModel(const Params &p)
     // The temperature passed here will be overwritten, if there is
     // a thermal model present
     for (auto & pms: states_pm){
-        pms->setTemperature(p.ambient_temp);
+        pms->setTemperature(p.ambient_temp.toCelsius());
     }
 
     dynamicPower
diff --git a/src/sim/power/thermal_domain.cc b/src/sim/power/thermal_domain.cc
index a5eb33c8e6..b0868becfe 100644
--- a/src/sim/power/thermal_domain.cc
+++ b/src/sim/power/thermal_domain.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015 ARM Limited
+ * Copyright (c) 2015, 2021 Arm Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -49,7 +49,7 @@
 #include "sim/sub_system.hh"
 
 ThermalDomain::ThermalDomain(const Params &p)
-    : SimObject(p), _initTemperature(p.initial_temperature),
+    : SimObject(p), _initTemperature(p.initial_temperature.toCelsius()),
     node(NULL), subsystem(NULL),
     ADD_STAT(currentTemp, "Temperature in centigrade degrees")
 {
diff --git a/src/sim/power/thermal_model.cc b/src/sim/power/thermal_model.cc
index a37240b9b1..c57e284c9c 100644
--- a/src/sim/power/thermal_model.cc
+++ b/src/sim/power/thermal_model.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015 ARM Limited
+ * Copyright (c) 2015, 2021 Arm Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -51,7 +51,7 @@
  * ThermalReference
  */
 ThermalReference::ThermalReference(const Params &p)
-    : SimObject(p), _temperature(p.temperature), node(NULL)
+    : SimObject(p), _temperature(p.temperature.toCelsius()), node(NULL)
 {
 }