Learn why MSFS 2020 live weather is inaccurate and fix stale data, METAR mismatches, wrong settings and conflicting weather injectors.
MSFS 2020 live weather can look inaccurate because it blends forecast-model data with airport observations, updates can arrive late, and conditions are interpolated between reporting stations. Confirm Live Weather is selected, check the simulator’s online connection and system clock, then restart the session and disable any third-party weather injector.
Why does MSFS 2020 live weather differ from real weather?
Microsoft Flight Simulator 2020 does not reproduce every METAR as a literal, instantaneous weather preset. Its weather engine combines broader forecast data with airport observations, then turns that information into a continuous three-dimensional atmosphere.
A METAR describes conditions at one reporting station and has its own observation time. By the time an app displays that report and MSFS receives and blends it, the real weather may have changed. Cloud amount, visibility and precipitation also require interpretation when converted into volumetric weather, so they rarely match line by line.
Our explanation of how forecast data, METARs and weather presets interact covers this blending in more detail.
| What you see | Likely cause | Best first action |
|---|---|---|
| The same old conditions at several airports | Stale online session or a weather-service problem | Quit MSFS completely and start a fresh flight |
| Pressure is close, but clouds or visibility differ | Normal forecast and METAR blending | Compare timestamps and allow for rendering differences |
| Only one airport is wrong | Old, missing or sparse local observations | Check another nearby reporting airport |
| Weather changes when an add-on starts | Competing weather injector or preset | Use only one weather source |
| Live Weather is unavailable or greyed out | Online functionality, account or flight-mode issue | Follow our checks for missing or disabled MSFS 2020 live weather |
How do I fix inaccurate live weather in MSFS 2020?
The quickest fix is to test Live Weather in a clean Free Flight session, then eliminate stale online data and add-on conflicts in order.
- Start with a valid comparison. Choose an airport that issues regular observations, note the report’s UTC observation time and compare conditions at the airport rather than many miles away. Do not compare present live weather with an old screenshot or a report from a different hour.
- Select Live Weather before loading the flight. On the World Map, confirm the weather mode says Live Weather rather than Clear Skies, a custom preset or an add-on preset. Changing the clock does not turn a preset into live weather, and Live Weather should not be treated as a historical-weather archive.
- Check Online Functionality. In General Options under Data, make sure Online Functionality is enabled and that MSFS has not reported a lost connection. Also set the PC or console date, time and time zone correctly; a badly incorrect system clock can interfere with online-service authentication.
- Restart the entire simulator. Return to the desktop and relaunch MSFS rather than merely going back to the main menu. On Xbox, close the game fully instead of resuming an old Quick Resume session, which can retain stale online state.
- Remove competing weather sources. On PC, close external weather programs and temporarily test with the
Communityfolder empty or renamed. Weather presets, environment modifications and injectors can override or alter the built-in result; run only one injector at a time. - Test a second airport in another region. A single bad station points towards delayed or sparse local data. Old or identical weather across widely separated airports suggests a stale session, connectivity problem or temporary service-side fault.
- Check the network only if the problem is widespread. Restart the connection and test without a VPN or proxy. Make sure security software permits MSFS and its platform services to connect, but avoid changing firewall rules blindly when every other online feature works.
If multiple airports remain obviously stale after a clean restart, the fault may be upstream. There is no local file that can repair delayed weather-server data; retrying later is more useful than reinstalling the simulator.
How closely should Live Weather match a METAR?
Pressure, temperature and surface wind near a reporting airport should usually be recognisable, but an exact match across every field is not guaranteed. Small differences are expected; clear skies during reported heavy rain, a large pressure error or unchanged conditions across several tests indicate a genuine problem.
- Check the observation time: the METAR timestamp is the time observed, not necessarily the moment it appeared in the source being used for comparison.
- Compare the same location: an airport report cannot describe every cloud or shower between stations.
- Separate surface weather from winds aloft: a METAR does not provide the full upper-air profile used by the simulator.
- Allow for weather synthesis: a few coded cloud layers must be translated into a much larger volumetric cloud field.
Can I force MSFS 2020 to reproduce exact conditions?
Built-in Live Weather cannot be forced to reproduce a particular METAR exactly. For instrument practice or a repeatable scenario, use a custom preset and enter the required wind, cloud, visibility, pressure and precipitation manually.
An external engine may prioritise observations differently, but it replaces rather than repairs the built-in system. Check compatibility and disable MSFS Live Weather before using one; our overview of live-weather programs and injector conflicts explains the available approach.
Should I delete the rolling cache or reinstall MSFS?
No, not as an initial fix. The rolling cache stores streamed scenery rather than live weather observations, so clearing it normally does nothing for inaccurate conditions. Reinstallation is also unlikely to help when the cause is report timing, forecast blending, an add-on conflict or a service-side delay.