Recently some of the sensors on my original Weatherflow’s Sky unit gave up the ghost, and I had to purchase a new Tempest to replace it. I was most bummed to learn that there’s no way to merge the historical data of the original Weatherflow weather station with the data from the new Tempest. All this valuable weather data is just cosmic debris now? Those of you who have already been down this road, how did you preserve your Weatherflow data so that it’s accessible when you want to refer back to it?
Unfortunately. . .your suspicions are correct. Although the two weather stations are by the same manufacturer (WeatherFlow | Tempest°). . .the devices are entirely different and to my knowledge. . .there is no way to retrieve WeatherFlow’s database and merge it into the Tempest° database.
But with increased technology and AI. . .that may have been perfected by now. Open a ticket with Support by mousing over Support at the top right portion of this page. . .then use the pull-down to find Open a ticket and fill in the requested information and submit.
I learned very early on. . .about 6 years ago as a Field Tester. . .each day to “archive” the days’ weather data from Tempest° by copy and paste the History for each day into a pptx file for every given month. e.g I just archived today’s Historical data for 01/20/2026 into the pptx file for January 2026. I have Tempest° History dating back to January 2000.
A couple of my past Tempest° devices met with some unfortunate sensor failures. I was lucky, however, because I had the data archived into my daily pptx file. . .but only lost a few small pieces of info. Had I not done my “daily archive” . . .I’d have no “Look-back Weather” what-so-ever to see what happened in the past.
Also. . .if some situation was to occur at the Tempest° Facility. . .I have my data preserved in a pptx and stored in several “redundant” locations.
I have one old WFSWS (Smart Weather Station) [WF-SKY01 & WF-AIR01] plus 2 backyard Tempest° devices. I have 3 archive pptx files that I have to save data for each day. . .because one never knows what will happen!
Here is an example of one the Tempest° pptx files. . .
At the end of each month. . .I archve the Monthly data. . .and the end of each calendar year. . .I save the Yearly data.
Why not use IFTTT to export the raw data to a spreadsheet all day/every day?
Just don’t delete the old device from your station and the data will be available. If you replaced your station, don’t delete the station.
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Some time ago, the Weatherflow/Tempest team had the capability to merge the data from an old device so that no data is lost. This was accomplished by opening a support ticket. I would give that a shot.
I appreciate the responses I’ve gotten here. As suggested, I’ve reached out to tech support and opened a new ticket on this topic.
In the meantime, regarding the suggestions to archive the data in a spreadsheet, is there a way to export years of data into Excel?
>Just don’t delete the old device from your station and the data will be available.<
This suggestion intrigues me. I haven’t installed my Tempest yet. Can I assign the Tempest to the same station that my Weatherflow was reporting to? And if the Weatherflow equipment is no longer functioning, will the data remain indefinitely on the station?
This only applied for like-to-like migrations, ie a Tempest to another Tempest. You can do that from the app now with the “replace device” function. I don’t think that it is a simple task to migrate from the legacy Air/Sky devices to a Tempest on the back end, because the data is from two different devices and is probably stored as such in the back end.
You can most certainly add a Tempest to an old Air/Sky Hub as an additional device. The gotcha is that the Air/Sky use an ancient version of the Hub, and IIRC the Air/Sky Hub is unable to do firmware updates to a Tempest sensor if they are needed.
With regards to data retention, it seems to be held “forever” in the cloud…subject to WF-T’s bucket-aging algorithms where it loses granularity as it ages. Feel free to check out my station 910 (The Land of Misfit Toys) to see sensors that have been offline for 5+ years and how the data ages. You will need to zoom out all the way on many of them in the graphs and scroll a ways to the left:
https://tempestwx.com/station/910/grid
Also worth noting is that the latest Hubs being shipped reportedly do not have support to connect legacy Air/Sky devices…although this may only be the Tempest One ethernet and cellular Hubs. In any case, you can have multiple Hubs of different generations registered under one WF user account and select between them from a pull-down list of stations:
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Thank you for that very thorough reply. I really appreciate it.
So if I’ve got this right, I can’t merge the data, but I can add the new Tempest equipment to my existing station, and then toggle between its new data and the old Weatherflow data via a dropdown menu, is that right?
I visited your station, but I was not able to find the drop-down menu for The Land of Misfit Toys to see your archived data. Both my mobile version and desktop version look quite different than the screen grab you provided. Are you using a third-party app to display the data?
The drop-down is the four different Hubs connected to my WF-T user account. As a guest, you can only see an individual station. The one you screenshotted is the correct one, although I have no clue why the changed name isn’t reflected in the public view of that station.
Since there are issues with firmware updates on Tempest sensors using the old Air/Sky Hubs, I assume that WF will send you a complete package with a new Hub. Register that as a second Hub on your current WF-T account, and then you can switch between the old Hub/Air/Sky and the new Hub/Tempest depending on whether you want to see old or newer historical data…