diff --git a/web/app.py b/web/app.py
index 3509952c..a3d3c24f 100644
--- a/web/app.py
+++ b/web/app.py
@@ -586,6 +586,7 @@ async def city_history(name: str):
         act = rec.get("actual_high")
         deb = rec.get("deb_prediction")
         mu = rec.get("mu")
+        mgm = rec.get("forecasts", {}).get("MGM")
         
         # Only return items where we have at least an actual or a prediction
         out.append({
@@ -593,6 +594,7 @@ async def city_history(name: str):
             "actual": float(act) if act is not None else None,
             "deb": float(deb) if deb is not None else None,
             "mu": float(mu) if mu is not None else None,
+            "mgm": float(mgm) if mgm is not None else None,
         })
     return {"history": out}
 
diff --git a/web/static/app.js b/web/static/app.js
index 97c28cc3..1816ae00 100644
--- a/web/static/app.js
+++ b/web/static/app.js
@@ -1167,12 +1167,14 @@ async function openHistoryModal() {
     const actuals = [];
     const debs = [];
     const mus = [];
+    const mgms = [];
 
     data.forEach((row) => {
       dates.push(row.date);
       actuals.push(row.actual);
       debs.push(row.deb);
       mus.push(row.mu);
+      mgms.push(row.mgm);
 
       if (row.actual != null && row.deb != null) {
         debErrors.push(Math.abs(row.actual - row.deb));
@@ -1242,6 +1244,16 @@ async function openHistoryModal() {
             tension: 0.2,
             pointRadius: 3,
           },
+          {
+            label: "MGM 官方预报",
+            data: mgms,
+            borderColor: "#fb923c", // orange
+            backgroundColor: "transparent",
+            borderWidth: 2,
+            tension: 0.2,
+            pointRadius: 3,
+            hidden: false, // Show by default for Ankara
+          },
         ],
       },
       options: {