Download older observations

Use Download Older Observations when recent data exists but earlier months or years are missing. On Mac, the command is Download Older Data. For Airport (METAR), it is Download All Available History.

On iPhone and iPad, open Settings › Manage Data, then choose Download Older Observations. The Manage Data icon in the Station tab toolbar opens the same screen.
On macOS, choose Data › Download Older Data.

Weather Fusion continues the provider’s supported historical backfill from the oldest known coverage. Keep the app active while the task runs.

Provider history depth, account access, and rate limits determine how far the download can go. If the provider reports a retry time, let the task stop and retry later instead of repeatedly restarting it.

For Airport (METAR), automatic history downloads stop at the last 10 calendar years. Choose Download All Available History to retrieve earlier records when the airport has an older archive. Check Provider Details › Historical Reports in station details for availability. Manage Data and the Data Inspector show an estimated number of days only after archive coverage is verified; unresolved availability has no estimate. See How Weather Fusion gets data for archive coverage limits.

Download progress appears in Station › Activity on iPhone and iPad, and in the activity control or Window › Activity Progress on Mac. The first METAR history download also has a progress strip in Historical on iPhone and iPad. After stopping a resumable download, the command can change to Resume.

Inspect the recovered range in Observations. If only gaps between existing rows are missing, use Fill gaps in historical data instead.