diff --git a/src/bot/runtime_coordinator.py b/src/bot/runtime_coordinator.py
index c8065aa6..e10a1946 100644
--- a/src/bot/runtime_coordinator.py
+++ b/src/bot/runtime_coordinator.py
@@ -89,6 +89,7 @@ class StartupCoordinator:
             self._start_weekly_reward_loop(),
             self._start_payment_event_loop(),
             self._start_payment_confirm_loop(),
+            self._start_daily_weather_report_loop(),
         ]
         self._runtime_status = RuntimeStatus(
             started_at=datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S UTC"),
@@ -157,7 +158,19 @@ class StartupCoordinator:
         details = {
             "mode": "airport-periodic",
             "interval_sec": interval,
-            "cities": ["seoul", "busan", "tokyo", "ankara", "helsinki", "amsterdam", "istanbul", "paris", "hong kong", "lau fau shan", "taipei"],
+            "cities": [
+                "seoul",
+                "busan",
+                "tokyo",
+                "ankara",
+                "helsinki",
+                "amsterdam",
+                "istanbul",
+                "paris",
+                "hong kong",
+                "lau fau shan",
+                "taipei",
+            ],
             "chat_targets": len(chat_ids),
             "window": "DEB proximity ≤3°C",
         }
@@ -168,7 +181,9 @@ class StartupCoordinator:
             configured_enabled=enabled,
             details=details,
             validation_error=validation_error,
-            starter=lambda: import_module("src.utils.telegram_push").start_high_freq_airport_push_loop(
+            starter=lambda: import_module(
+                "src.utils.telegram_push"
+            ).start_high_freq_airport_push_loop(
                 self.bot,
                 self.config,
             ),
@@ -222,7 +237,9 @@ class StartupCoordinator:
         settle_weekday = min(
             7, max(1, _env_int("POLYWEATHER_WEEKLY_REWARD_SETTLE_WEEKDAY", 1))
         )
-        settle_hour = min(23, max(0, _env_int("POLYWEATHER_WEEKLY_REWARD_SETTLE_HOUR", 0)))
+        settle_hour = min(
+            23, max(0, _env_int("POLYWEATHER_WEEKLY_REWARD_SETTLE_HOUR", 0))
+        )
         settle_minute = min(
             59, max(0, _env_int("POLYWEATHER_WEEKLY_REWARD_SETTLE_MINUTE", 5))
         )
@@ -249,9 +266,9 @@ class StartupCoordinator:
             configured_enabled=enabled,
             details=details,
             validation_error=validation_error,
-            starter=lambda: import_module("src.bot.weekly_reward_loop").start_weekly_reward_loop(
-                self.bot
-            ),
+            starter=lambda: import_module(
+                "src.bot.weekly_reward_loop"
+            ).start_weekly_reward_loop(self.bot),
         )
 
     def _start_payment_confirm_loop(self) -> LoopStatus:
@@ -318,6 +335,41 @@ class StartupCoordinator:
             ).start_payment_event_loop(),
         )
 
+    def _start_daily_weather_report_loop(self) -> LoopStatus:
+        enabled = _env_bool("DAILY_WEATHER_REPORT_ENABLED", True)
+        chat_ids = get_telegram_chat_ids_from_env()
+        report_hour = _env_int("DAILY_WEATHER_REPORT_HOUR", 8)
+        report_minute = _env_int("DAILY_WEATHER_REPORT_MINUTE", 0)
+        tz_name = str(
+            os.getenv("DAILY_WEATHER_REPORT_TIMEZONE") or "Asia/Shanghai"
+        ).strip()
+        details = {
+            "schedule": f"{report_hour:02d}:{report_minute:02d}",
+            "timezone": tz_name,
+            "cities": [
+                "beijing",
+                "shanghai",
+                "guangzhou",
+                "chengdu",
+                "chongqing",
+                "wuhan",
+                "qingdao",
+            ],
+            "target": "forum_general_topic",
+            "chat_targets": len(chat_ids),
+        }
+        validation_error = None
+        return self._start_with_validation(
+            key="daily_weather_report",
+            label="中国城市天气日报",
+            configured_enabled=enabled,
+            details=details,
+            validation_error=validation_error,
+            starter=lambda: import_module(
+                "src.utils.daily_weather_report"
+            ).start_daily_weather_report_loop(self.bot, self.config),
+        )
+
 
 def render_runtime_status_html(status: RuntimeStatus) -> str:
     lines = [
diff --git a/src/utils/daily_weather_report.py b/src/utils/daily_weather_report.py
new file mode 100644
index 00000000..af7aeeb7
--- /dev/null
+++ b/src/utils/daily_weather_report.py
@@ -0,0 +1,271 @@
+"""Daily weather report for Chinese cities — AI-generated narrative pushed to Telegram."""
+
+from __future__ import annotations
+
+import json
+import os
+import threading
+import time
+from datetime import datetime
+from typing import Any, Dict, List, Optional
+
+import httpx
+from loguru import logger
+
+try:
+    from zoneinfo import ZoneInfo
+except Exception:
+    from datetime import timezone as _utc_tz
+    from datetime import timedelta as _td
+
+    ZoneInfo = None  # type: ignore[assignment]
+
+from src.data_collection.city_registry import CITY_REGISTRY
+from src.data_collection.weather_sources import WeatherDataCollector
+
+TARGET_CITIES: List[str] = [
+    "beijing",
+    "shanghai",
+    "guangzhou",
+    "chengdu",
+    "chongqing",
+    "wuhan",
+    "qingdao",
+]
+
+FORUM_CHAT_ID = "-1003965137823"
+
+CITY_NAME_ZH: Dict[str, str] = {
+    "beijing": "北京",
+    "shanghai": "上海",
+    "guangzhou": "广州",
+    "chengdu": "成都",
+    "chongqing": "重庆",
+    "wuhan": "武汉",
+    "qingdao": "青岛",
+}
+
+
+def _env_bool(name: str, default: bool) -> bool:
+    raw = os.getenv(name)
+    if raw is None:
+        return default
+    return raw.strip().lower() in {"1", "true", "yes", "on"}
+
+
+def _env_int(name: str, default: int, min_val: int = 0) -> int:
+    try:
+        return max(min_val, int(os.getenv(name, str(default))))
+    except (TypeError, ValueError):
+        return default
+
+
+def _fetch_city_data(
+    collector: WeatherDataCollector, city_key: str
+) -> Optional[Dict[str, Any]]:
+    info = CITY_REGISTRY.get(city_key)
+    if not info:
+        return None
+
+    try:
+        results = collector.fetch_all_sources(
+            city_key,
+            lat=info["lat"],
+            lon=info["lon"],
+            include_taf=False,
+            include_ensemble=False,
+            include_multi_model=False,
+        )
+    except Exception as exc:
+        logger.warning(f"daily_weather_report: fetch failed for {city_key}: {exc}")
+        return None
+
+    if not isinstance(results, dict):
+        return None
+
+    om = results.get("open-meteo", {}) if isinstance(results, dict) else {}
+    current = om.get("current_weather", {}) if isinstance(om, dict) else {}
+    daily = om.get("daily", {}) if isinstance(om, dict) else {}
+    metar = results.get("metar", {}) if isinstance(results, dict) else {}
+
+    daily_highs = daily.get("temperature_2m_max", []) or []
+    today_high = daily_highs[0] if daily_highs else None
+    daily_times = daily.get("time", []) or []
+    today_date = daily_times[0] if daily_times else None
+
+    return {
+        "city": city_key,
+        "name": CITY_NAME_ZH.get(city_key, city_key),
+        "temp": current.get("temperature"),
+        "wind_speed": current.get("windspeed"),
+        "wind_dir": current.get("winddirection"),
+        "weather_code": current.get("weathercode"),
+        "forecast_high": today_high,
+        "forecast_date": today_date,
+        "metar_raw": (metar.get("raw_metar") or metar.get("raw") or "")
+        if isinstance(metar, dict)
+        else "",
+    }
+
+
+def _build_ai_prompt(cities_data: List[Dict[str, Any]]) -> str:
+    data_json = json.dumps(cities_data, ensure_ascii=False, indent=2, default=str)
+    return (
+        "你是天气预报播报员。以下是今天中国主要城市的实时天气数据（JSON格式）。\n\n"
+        f"{data_json}\n\n"
+        "请用自然、亲切的中文写一段天气日报，要求：\n"
+        "1. 每个城市1-2句，描述今天天气状况（晴/多云/雨等）和温度体感\n"
+        "2. 温度用摄氏度（℃），风速用 km/h\n"
+        "3. 语气轻松自然，像朋友聊天，不要机械罗列数据\n"
+        "4. 可以提一句户外活动建议或穿衣提示\n"
+        "5. 格式：<b>城市名</b> 加粗，用 HTML 标签\n"
+        "6. 开头加一句日期和问候，例如「☀️ 早上好！今天是 5 月 23 日」\n"
+        "7. 总体控制在 500 字以内\n"
+        "8. metar_raw 是机场观测报文，可辅助判断天气现象\n"
+        "weather_code 参考：0=晴, 1-3=多云, 45-48=雾, 51-67=雨, 71-86=雪, 95-99=雷暴"
+    )
+
+
+def _call_ai(prompt: str) -> Optional[str]:
+    api_key = os.getenv("POLYWEATHER_SCAN_AI_API_KEY", "")
+    base_url = os.getenv(
+        "POLYWEATHER_SCAN_AI_BASE_URL", "https://token-plan-cn.xiaomimimo.com/v1"
+    )
+    model = os.getenv(
+        "DAILY_REPORT_AI_MODEL",
+        os.getenv("POLYWEATHER_SCAN_AI_MODEL", "mimo-v2.5-pro"),
+    )
+
+    if not api_key:
+        logger.warning("daily_weather_report: AI API key not configured")
+        return None
+
+    payload = {
+        "model": model,
+        "messages": [
+            {"role": "user", "content": prompt},
+        ],
+        "max_tokens": 1200,
+        "temperature": 0.7,
+    }
+
+    timeout = httpx.Timeout(timeout=30.0, connect=8.0, read=30.0)
+    try:
+        with httpx.Client(timeout=timeout) as client:
+            resp = client.post(
+                f"{base_url}/chat/completions",
+                headers={
+                    "Authorization": f"Bearer {api_key}",
+                    "Content-Type": "application/json",
+                },
+                json=payload,
+            )
+            resp.raise_for_status()
+            data = resp.json()
+            content = data.get("choices", [{}])[0].get("message", {}).get("content", "")
+            return str(content).strip() if content else None
+    except Exception as exc:
+        logger.warning(f"daily_weather_report: AI call failed: {exc}")
+        return None
+
+
+def _runner(bot: Any, config: Dict[str, Any]) -> None:
+    enabled = _env_bool("DAILY_WEATHER_REPORT_ENABLED", True)
+    if not enabled:
+        logger.info("daily_weather_report: disabled by env")
+        return
+
+    tz_name = str(os.getenv("DAILY_WEATHER_REPORT_TIMEZONE") or "Asia/Shanghai").strip()
+    report_hour = _env_int("DAILY_WEATHER_REPORT_HOUR", 8)
+    report_minute = _env_int("DAILY_WEATHER_REPORT_MINUTE", 0)
+
+    if ZoneInfo is None:
+        local_tz = _utc_tz(_td(hours=8))
+    else:
+        try:
+            local_tz = ZoneInfo(tz_name)
+        except Exception:
+            local_tz = ZoneInfo("Asia/Shanghai")
+
+    collector = WeatherDataCollector(config)
+
+    logger.info(
+        "daily_weather_report: started tz={} time={:02d}:{:02d} cities={}",
+        tz_name,
+        report_hour,
+        report_minute,
+        len(TARGET_CITIES),
+    )
+
+    sent_today = False
+
+    while True:
+        try:
+            now = datetime.now(local_tz)
+
+            if now.hour == 0 and now.minute < 5:
+                sent_today = False
+
+            if (
+                now.hour == report_hour
+                and now.minute >= report_minute
+                and not sent_today
+            ):
+                logger.info("daily_weather_report: generating report...")
+
+                cities_data: List[Dict[str, Any]] = []
+                for city_key in TARGET_CITIES:
+                    data = _fetch_city_data(collector, city_key)
+                    if data:
+                        cities_data.append(data)
+
+                if not cities_data:
+                    logger.warning("daily_weather_report: no city data available")
+                    sent_today = True
+                    time.sleep(60)
+                    continue
+
+                prompt = _build_ai_prompt(cities_data)
+                report_text = _call_ai(prompt)
+
+                if not report_text:
+                    logger.warning("daily_weather_report: AI returned empty content")
+                    sent_today = True
+                    time.sleep(60)
+                    continue
+
+                try:
+                    bot.send_message(
+                        FORUM_CHAT_ID,
+                        report_text,
+                        message_thread_id=0,
+                        parse_mode="HTML",
+                        disable_web_page_preview=True,
+                    )
+                    logger.info(
+                        "daily_weather_report: sent successfully chars={} cities={}",
+                        len(report_text),
+                        len(cities_data),
+                    )
+                except Exception as exc:
+                    logger.warning("daily_weather_report: send failed: {}", exc)
+
+                sent_today = True
+
+            time.sleep(60)
+        except Exception as exc:
+            logger.warning(f"daily_weather_report: cycle error: {exc}")
+            time.sleep(60)
+
+
+def start_daily_weather_report_loop(
+    bot: Any, config: Dict[str, Any]
+) -> threading.Thread:
+    thread = threading.Thread(
+        target=_runner,
+        args=(bot, config),
+        daemon=True,
+        name="daily-weather-report-loop",
+    )
+    thread.start()
+    return thread