I’m happy it is working for you.
For others who may see this thread, the only thing you would have to do is replace the api_key in the existing [Forecast] section. The location will be ignored. As such, you can delete the location line if you want. Lastly, in the unlikely event you want a forecast for some area other than the lat/long of your station, add a latitude and longitude to the [Forecast] section. John
Yes, I signed up back in July and had the new API key but no way of using it. It seems to be working now, I replaced the existing UKMO section in weeewx.conf with the one from the V4 readme and added my datahub API.
Thanks for the help and the update 👍
Regards
Jimi On 18 October 2025 18:22:54 BST, 'John Kline' via weewx-user < [email protected]> wrote:
Did you sign up for the datahub service and replace the old api key with the new one? That’s all you need to do. You can delete the location parameter in the Forecast section if you want, but it won’t be used either way.
Cheers Vince I did read the readme file, but it wasn't clear (to me) if the installer would insert the new section to which I should add the new API key or I had to replace the original UKMO section with the new one and add the API key. I'll give it a try and see how it goes Regards Jimi On Saturday, 18 October 2025 at 17:45:01 UTC+1 vince wrote:
Updating skins/extensions does not tend to modify a pre-existing weewx.conf configuration section for that item. You probably need to do a little hand editing per the readme file at https://github.com/chaunceygardiner/weewx-forecast
On Saturday, October 18, 2025 at 9:25:58 AM UTC-7 Jimi Lawson wrote:
I'm struggling to upgrade weewx-forecast from V3.4.0 to V4.0 on weewx 4.10.2 (Rpi 3B) . It appears to install OK
"sudo wee_extension --install /etc/weewx/scripts/weewx-forecast-4.0.zip
Request to install '/etc/weewx/scripts/weewx-forecast-4.0.zip'
Extracting from zip archive /etc/weewx/scripts/weewx-forecast-4.0.zip
Saving installer file to /usr/share/weewx/user/installer/forecast
Saved configuration dictionary. Backup copy at /etc/weewx/weewx.conf.20251018155320
Finished installing extension '/etc/weewx/scripts/weewx-forecast-4.0.zip'
A backup weewx.conf + a new version is created in etc/weewx, but the new version is the same as the backed up one, ie the UKMO section is still the one for datapoint not the new one for datahub.
I'm no doubt doing/missing something obvious, but it's been that long since I've had to mess with the installation that anything I did know has been relegated to some obscure corner of my mind. Any help/pointers would be greatly appreciated Regards Jimi
No Issue just a comment
On Wednesday, October 15, 2025 at 4:27:33 PM UTC+1 John Kline wrote:
Of course, not all API keys are this long. I take it you have an issue with the length? Thanks John
Are all api_keys this length or is it just UKMO ?
On Wednesday, October 15, 2025 at 1:57:07 AM UTC+1 John Smith wrote:
How good is their global forecast model?
Hi Phil,
I just pushed an v4.0 update to weewx-forecast that adds support for UK Met Office Datahub forecasts.
You’ll need to sign up for a Global Spot API key. It’s in the Site Specific section. The free plan should work for you as 360 is plenty of calls.
Global Spot Free plan should- 360 calls/day
The location parameter in the UKMO section is no longer used. Rather, a forecast is returned for the latitude and longitude of the station. If you want a forecast of something other than that, you can specify latitude and longitude in the UKMO section.
The new forecasts support more data than the old, so more items will show up in the sample forecast reports.
John Sorry to ask and its probably a question for either Mathew H or John K but could UKMO datahub be added to the forecast software Thanks Phil
On Monday, August 4, 2025 at 2:17:31 PM UTC+1 steepleian wrote:
Met Office have or in the process of changing data hubs so that may be the reason. weewx V 5.1.0 Been having problems getting downloads from UKMO for a while now but only started to look into it. It downloads 4/5 cycles Ok and then fails
025-08-04T12:50:17.090123+01:00 raspberrypi weewxd[1790]: ERROR user.forecast: UKMOThread: UKMO: missing field 'Location'
2025-08-04T12:50:17.090187+01:00 raspberrypi weewxd[1790]: INFO user.forecast: UKMOThread: UKMO: got 0 forecast records
If I then, shortly after the failure, delete forecast.sdb and reboot it downloads OK.
2025-08-04T13:02:14.535656+01:00 raspberrypi weewxd[2113]: INFO user.forecast: MainThread: UKMO: forecast version 3.4.0b2 2025-08-04T13:02:14.537368+01:00 raspberrypi weewxd[2113]: INFO user.forecast: MainThread: UKMO: interval=10800 max_age=604800 api_key=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXf051 location=354731
2025-08-04T13:05:17.618878+01:00 raspberrypi weewxd[1787]: INFO user.forecast: UKMOThread: UKMO: got 38 forecast records
It looks like a UKMO problem but why does it download OK if I delete the database shortly afterwards. Thanks Phil
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