Windows 11's built-in Weather app wastes more than 1 GB of RAM
摘要
Windows 11 自带天气应用被指内存占用异常高：据 Windows Latest 测试，显示预报时可超 1.2 GB，空闲时降至约 500–600 MB，缩放或导航等基本操作时可达 1.5–1.6 GB；在 8 GB 内存的电脑上约占系统内存近 20%。相比之下，macOS 原生天气应用在类似条件下内存占用低于 250 MB，约为微软实现的五分之一。原因在于该应用并非完全原生，而是基于 WebView2 框架的 MSN 天气网页应用，任务管理器可见多个 Chromium 子进程。文章还指出该应用内嵌广告，并提及高内存占用可能影响 8 GB 或 16 GB 内存的低端机型，与微软改善低配硬件性能的近期努力相矛盾。
荐读理由
这条实测数据让你看到微软自家 WebView2 应用在低配机上的真实内存代价，可作为评估 Windows 平台应用资源占用时的一个具体参考点
原文
Windows 11's built-in Weather app wastes more than 1 GB of RAM
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The Windows 11 logo. Microsoft has recently been working to improve the operating system's performance.
A new report shows Windows 11's built-in Weather app can consume more than 1 GB of RAM. By comparison, Apple's native Weather app on macOS uses roughly five times less memory under similar conditions.
Andrew Sozinov, Published 08/09/2026 🇩🇪
Microsoft has been working to make Windows 11 more efficient on PCs with limited RAM, but one of its own built-in applications appears to be working against that goal. According to tests published by Windows Latest, the operating system's Weather app can consume more than 1 GB of memory despite performing a relatively simple task.
Windows Latest reports that the app exceeded 1.2 GB of RAM while displaying a weather forecast, with no intensive interaction from the user. Wccftech observed similar behavior, noting that memory usage typically starts at around 1 GB, drops to roughly 500–600 MB when idle, and can climb to 1.5–1.6 GB during basic actions such as zooming or navigating the interface. On a PC equipped with 8 GB of RAM, that means the application alone may occupy nearly 20% of the system's memory.
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Windows 11's Weather app consumes more than 1 GB of RAM.
By comparison, Apple's native Weather app on macOS reportedly uses less than 250 MB of RAM under similar conditions, giving Microsoft's implementation a memory footprint roughly five times larger.
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Apple's Weather app on macOS uses less than 250 MB of RAM.
According to Windows Latest, the high memory consumption is due to the fact that Weather is not a fully native Windows application. Instead, it is essentially an MSN Weather web app built on Microsoft's WebView2 framework. Task Manager shows multiple Chromium-based subprocesses running simultaneously, which contributes to the unusually high RAM usage.
The issue is unlikely to affect high-end PCs with 32 GB or more of RAM, but it could have a noticeable impact on entry-level systems. On computers with 8 GB or even 16 GB of memory, launching the Weather app may increase memory pressure enough for Windows to rely more heavily on the page file, potentially making the system feel less responsive.
The application also includes advertising within its interface. According to Windows Latest, sponsored content is embedded directly into the forecast feed, appearing alongside weather cards in a similar visual style. While Microsoft licenses weather data from multiple providers — including Foreca, the European Centre for Medium-Range Weather Forecasts (ECMWF), and other regional meteorological services — the presence of ads in a built-in Windows application has attracted criticism.
The findings also appear to contradict Microsoft's recent efforts to improve Windows 11's efficiency. The company has been updating several built-in applications and has repeatedly said it wants the operating system to perform better on lower-end hardware. Microsoft executive Rudy Huyn has also stated that the company intends to develop more fully native Windows applications in the future, although it remains unclear whether MSN-branded applications such as Weather will eventually be rebuilt using WinUI.
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Andrew Sozinow - Tech Writer - 71 articles published on Notebookcheck since 2024
I’ve been fascinated by computers, electronics and modern technology since childhood. I started writing IT-news at high school and have been doing it continuously for more than 10 years. During this time, I have worked for many media outlets, and now I am a news editor at 3DNews. Sometimes I also write smartphone reviews. In July 2024, I decided to try my hand at writing news on Notebookcheck. When I'm not working, I like to play videogames, do puzzles, and travel.
Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2026 08 > Windows 11's built-in Weather app wastes more than 1 GB of RAM
Andrew Sozinov, 2026-08- 9 (Update: 2026-08- 9)
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