diff --git a/src/plugins/simulator/fsxcommon/simconnectdatadefinition.cpp b/src/plugins/simulator/fsxcommon/simconnectdatadefinition.cpp
index a8e4eb7a9..22745cdc1 100644
--- a/src/plugins/simulator/fsxcommon/simconnectdatadefinition.cpp
+++ b/src/plugins/simulator/fsxcommon/simconnectdatadefinition.cpp
@@ -136,6 +136,8 @@ namespace BlackSimPlugin::FsxCommon
         hr +=  SimConnect_AddToDataDefinition(hSimConnect, CSimConnectDefinitions::DataOwnAircraft, "ROTATION VELOCITY BODY X", "Radians per second");
         hr +=  SimConnect_AddToDataDefinition(hSimConnect, CSimConnectDefinitions::DataOwnAircraft, "ROTATION VELOCITY BODY Y", "Radians per second");
         hr +=  SimConnect_AddToDataDefinition(hSimConnect, CSimConnectDefinitions::DataOwnAircraft, "ROTATION VELOCITY BODY Z", "Radians per second");
+        // FS2020
+        hr +=  SimConnect_AddToDataDefinition(hSimConnect, CSimConnectDefinitions::DataOwnAircraft, "INDICATED ALTITUDE CALIBRATED", "Feet");
 
         hr +=  SimConnect_AddToDataDefinition(hSimConnect, CSimConnectDefinitions::DataOwnAircraftTitle, "TITLE", nullptr, SIMCONNECT_DATATYPE_STRING256);
         if (isFailure(hr))
diff --git a/src/plugins/simulator/fsxcommon/simconnectdatadefinition.h b/src/plugins/simulator/fsxcommon/simconnectdatadefinition.h
index 32904e041..ded906d03 100644
--- a/src/plugins/simulator/fsxcommon/simconnectdatadefinition.h
+++ b/src/plugins/simulator/fsxcommon/simconnectdatadefinition.h
@@ -77,6 +77,8 @@ namespace BlackSimPlugin::FsxCommon
         double rotationVelocityBodyY;   //!< Rotation Velocity Body Y
         double rotationVelocityBodyZ;   //!< Rotation Velocity Body Z
         // 44
+        double altitudeCalibratedFt;    //!< Altitude without temperature effect (ft, FS2020)
+        // 45
     };
 
     //! Data struct of aircraft position
diff --git a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
index 1db30001c..7d6e41fe9 100644
--- a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
+++ b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
@@ -655,6 +655,11 @@ namespace BlackSimPlugin::FsxCommon
         return true;
     }
 
+    void CSimulatorFsxCommon::setTrueAltitude(CAircraftSituation &aircraftSituation, const DataDefinitionOwnAircraft &simulatorOwnAircraft)
+    {
+        aircraftSituation.setAltitude(CAltitude(simulatorOwnAircraft.altitudeFt, CAltitude::MeanSeaLevel, CLengthUnit::ft()));
+    }
+
     void CSimulatorFsxCommon::updateOwnAircraftFromSimulator(const DataDefinitionOwnAircraft &simulatorOwnAircraft)
     {
         const qint64 ts = QDateTime::currentMSecsSinceEpoch();
@@ -677,7 +682,7 @@ namespace BlackSimPlugin::FsxCommon
         aircraftSituation.setHeading(CHeading(simulatorOwnAircraft.trueHeadingDeg, CHeading::True, CAngleUnit::deg()));
         aircraftSituation.setGroundSpeed(CSpeed(simulatorOwnAircraft.velocity, CSpeedUnit::kts()));
         aircraftSituation.setGroundElevation(CAltitude(simulatorOwnAircraft.elevationFt, CAltitude::MeanSeaLevel, CLengthUnit::ft()), CAircraftSituation::FromProvider);
-        aircraftSituation.setAltitude(CAltitude(simulatorOwnAircraft.altitudeFt, CAltitude::MeanSeaLevel, CLengthUnit::ft()));
+        setTrueAltitude(aircraftSituation, simulatorOwnAircraft);
         aircraftSituation.setPressureAltitude(CAltitude(simulatorOwnAircraft.pressureAltitudeM, CAltitude::MeanSeaLevel, CAltitude::PressureAltitude, CLengthUnit::m()));
         // set on ground also in situation for consistency and future usage
         // it is duplicated in parts
@@ -1998,7 +2003,13 @@ namespace BlackSimPlugin::FsxCommon
                 // update situation
                 if (forceUpdate || !this->isEqualLastSent(result.getInterpolatedSituation()))
                 {
-                    SIMCONNECT_DATA_INITPOSITION position = this->aircraftSituationToFsxPosition(result, sendGround);
+                    // adjust altitude to compensate for FS2020 temperature effect
+                    CAircraftSituation situation = result;
+                    const CLength relativeAltitude = situation.geodeticHeight() - getOwnAircraftPosition().geodeticHeight();
+                    const double altitudeDeltaWeight = 2 - qBound(3000.0, relativeAltitude.abs().value(CLengthUnit::ft()), 6000.0) / 3000;
+                    situation.setAltitude({ situation.getAltitude() + m_altitudeDelta * altitudeDeltaWeight, situation.getAltitude().getReferenceDatum() });
+
+                    SIMCONNECT_DATA_INITPOSITION position = this->aircraftSituationToFsxPosition(situation, sendGround);
                     const HRESULT hr = this->logAndTraceSendId(
                                             SimConnect_SetDataOnSimObject(
                                                 m_hSimConnect, CSimConnectDefinitions::DataRemoteAircraftSetPosition,
diff --git a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.h b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.h
index 853b3a897..f7562233d 100644
--- a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.h
+++ b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.h
@@ -337,6 +337,8 @@ namespace BlackSimPlugin::FsxCommon
         int  m_addedProbes = 0;                //!< added probes
         QMap<DWORD, BlackMisc::Aviation::CCallsign> m_pendingProbeRequests; //!< pending elevation requests: requestId/aircraft callsign
 
+        BlackMisc::PhysicalQuantities::CLength m_altitudeDelta; //!< FS2020 effect of temperature on altitude
+
     private:
         //! Reason for adding an aircraft
         enum AircraftAddMode
@@ -471,6 +473,9 @@ namespace BlackSimPlugin::FsxCommon
         //! Probe data sent from simulator
         void updateProbeFromSimulator(const BlackMisc::Aviation::CCallsign &callsign, const DataDefinitionPosData &remoteAircraftData);
 
+        //! Customization point for adjusting altitude to compensate for temperature effect
+        virtual void setTrueAltitude(BlackMisc::Aviation::CAircraftSituation &aircraftSituation, const BlackSimPlugin::FsxCommon::DataDefinitionOwnAircraft &simulatorOwnAircraft);
+
         //! Called when data about our own aircraft are received
         void updateOwnAircraftFromSimulator(const DataDefinitionOwnAircraft &simulatorOwnAircraft);
 
diff --git a/src/plugins/simulator/fsxcommon/simulatorfsxsimconnectproc.cpp b/src/plugins/simulator/fsxcommon/simulatorfsxsimconnectproc.cpp
index 50ab2e1fa..5e051ae09 100644
--- a/src/plugins/simulator/fsxcommon/simulatorfsxsimconnectproc.cpp
+++ b/src/plugins/simulator/fsxcommon/simulatorfsxsimconnectproc.cpp
@@ -241,7 +241,7 @@ namespace BlackSimPlugin::FsxCommon
                 {
                 case CSimConnectDefinitions::RequestOwnAircraft:
                     {
-                        static_assert(sizeof(DataDefinitionOwnAircraft) == 44 * sizeof(double), "DataDefinitionOwnAircraft has an incorrect size.");
+                        static_assert(sizeof(DataDefinitionOwnAircraft) == 45 * sizeof(double), "DataDefinitionOwnAircraft has an incorrect size.");
                         const DataDefinitionOwnAircraft *ownAircaft = reinterpret_cast<const DataDefinitionOwnAircraft *>(&pObjData->dwData);
                         simulatorFsxP3D->updateOwnAircraftFromSimulator(*ownAircaft);
                         break;
diff --git a/src/plugins/simulator/msfs/simulatormsfs.cpp b/src/plugins/simulator/msfs/simulatormsfs.cpp
index 339db3f72..e080b7ea2 100644
--- a/src/plugins/simulator/msfs/simulatormsfs.cpp
+++ b/src/plugins/simulator/msfs/simulatormsfs.cpp
@@ -18,6 +18,7 @@ using namespace BlackMisc::Simulation;
 using namespace BlackMisc::Simulation::FsCommon;
 using namespace BlackMisc::Weather;
 using namespace BlackCore;
+using namespace BlackSimPlugin::FsxCommon;
 
 namespace BlackSimPlugin::Msfs
 {
@@ -49,6 +50,12 @@ namespace BlackSimPlugin::Msfs
     #endif
     }
 
+    void CSimulatorMsFs::setTrueAltitude(CAircraftSituation &aircraftSituation, const DataDefinitionOwnAircraft &simulatorOwnAircraft)
+    {
+        aircraftSituation.setAltitude(CAltitude(simulatorOwnAircraft.altitudeCalibratedFt, CAltitude::MeanSeaLevel, CLengthUnit::ft()));
+        m_altitudeDelta = { simulatorOwnAircraft.altitudeFt - simulatorOwnAircraft.altitudeCalibratedFt, CLengthUnit::ft() };
+    }
+
     void CSimulatorMsFsListener::startImpl()
     {
     #ifdef Q_OS_WIN64
diff --git a/src/plugins/simulator/msfs/simulatormsfs.h b/src/plugins/simulator/msfs/simulatormsfs.h
index a6f48725b..191522109 100644
--- a/src/plugins/simulator/msfs/simulatormsfs.h
+++ b/src/plugins/simulator/msfs/simulatormsfs.h
@@ -33,6 +33,8 @@ namespace BlackSimPlugin::Msfs
         //! @{
         virtual bool connectTo() override;
         //! @}
+
+        virtual void setTrueAltitude(BlackMisc::Aviation::CAircraftSituation &aircraftSituation, const BlackSimPlugin::FsxCommon::DataDefinitionOwnAircraft &simulatorOwnAircraft) override;
     };
 
     //! Listener for MSFS