diff --git a/weather_report.py b/weather_report.py
index 6148308..4f5fd58 100644
--- a/weather_report.py
+++ b/weather_report.py
@@ -85,8 +85,11 @@ def _data_temp_hourly(start: datetime, end: datetime):
 
 
 def _data_rain_daily(start: datetime, end: datetime):
+    # +1 Tag extra damit der Abschlusswert des letzten Tages (kum. Zähler) enthalten ist
     data = fetch("/weather/range", {
-        "start": start.isoformat(), "end": end.isoformat(), "limit": 50000,
+        "start": start.isoformat(),
+        "end": (end + timedelta(days=1)).isoformat(),
+        "limit": 50000,
     })
     by_day: dict[str, list[float]] = defaultdict(list)
     for d in data:
@@ -95,11 +98,17 @@ def _data_rain_daily(start: datetime, end: datetime):
 
     dates, rain = [], []
     for day_key in sorted(by_day):
-        vals = by_day[day_key]
+        day_dt = datetime.fromisoformat(day_key).replace(tzinfo=timezone.utc)
+        if day_dt >= end:
+            break
+        vals = list(by_day[day_key])
+        next_key = (day_dt + timedelta(days=1)).strftime("%Y-%m-%d")
+        if next_key in by_day:
+            vals.append(by_day[next_key][0])
         daily = max(vals) - min(vals)
         if daily < 0:
             daily = max(vals)
-        dates.append(datetime.fromisoformat(day_key).replace(tzinfo=timezone.utc))
+        dates.append(day_dt)
         rain.append(round(daily, 1))
     return dates, rain