Observed Signal · Aug 10, 2026 · Technical Issue · Source: t3n · Impact: 1/5 · Sentiment: Negative
Application Performance Market: Windows 11 Weather App Slows PCs
Tests reported by Windows Latest and summarized by t3n show that the Windows 11 Weather app can consume unusually high system resources — up to about 1.2 GB of RAM and roughly 16.5% CPU even in idle on the tested system. The article attributes the resource usage to the app being implemented as a Web wrapper that loads an MSN Weather web view and spawns multiple subprocesses. By comparison, Apple’s Weather app on macOS used roughly 250 MB RAM idle and much lower CPU in the same tests. Microsoft previously updated the app (summer 2024) and has said it will replace some web apps with native versions, but it is unclear whether the Weather app will be migrated.
A consumer-facing application performance issue limited to a single OS app; low direct impact on broader AdTech/MarTech operations though relevant where webview-wrapped apps deliver ad content.
Wichtigste Kernpunkte & Evidenz
- Windows 11 Weather app was measured using up to 1.2 GB of RAM and about 16.5% CPU on a test system while idle.
- The app groups nine subprocesses under a process named 'Weather' including Renderer and GPU Process.
- The Windows Weather app is implemented as a Web application that loads an MSN Weather web view (essentially a browser window wrapped as an app).
- In the same comparison, Apple’s Weather app on macOS used around 250 MB RAM idle and about 1.3% CPU in idle on a MacBook Air M2.
- The issue was reported by Windows Latest and published on t3n.de on 2026-08-10.
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Windows Latest
Auf Microsoft spezialisierter Technologie-News-Publisher und Zielgruppen-Plattform.
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“For comparison, Windows Latest used Apple's Weather app on macOS....”
t3n
Führende deutsche Digital-Business- und Tech-Plattform, die B2B-Reichweite durch Premium-Subscriptions, First-Party-Data-Monetarisierung und hochgradig zielgerichtete Media-Sales-Lösungen in der DACH-Region wertschöpft.
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“It began when Microsoft released an update for the application in summer 2024....”
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