I’m on Snapshot 2.5.0. and got it running with OWM and DarkSky. Perhaps there is a bug in 2.4.0?
Mind you, I didn’t try again on subsequent snapshots.
What happens when you use the following command?
bundle:list | Grep Scheduler
Something like this?
109 x Active x 80 x 0.11.0.201812301624 x Eclipse SmartHome Scheduler Service
I get this:
107 x Active x 80 x 0.10.0.oh240 x Eclipse SmartHome Scheduler Service
Now I’m out. Sorry! 
Ok, last try.
Please download the following file:
Inside this archive, go to:
\repository\org\openhab\binding\org.openhab.binding.weather\1.13.0\
extract
org.openhab.binding.weather-1.13.0.jar
Uninstall weather1 binding with PaperUI or remove it from addons.cfg.
Copy above org.openhab.binding.weather-1.13.0.jar into /usr/share/openhab2/addons
Still Null :-/
I think i’m gonna throw in the towel on this for awhile too. 
not sure what might be going on…
But maybe something will surface down the road.
thanks again for your efforts 
You can also try: 1.12.0 (=older) version of weather1 binding or 1.14.0 (=newer), to be sure that’s not a binding error by itself.
org.openhab.binding.weather-1.12.0.pdf (321.7 KB)
org.openhab.binding.weather-1.14.0-SNAPSHOT.pdf (320.3 KB)
Please rename them to org.openhab.binding.weather-1.12.0.jar and org.openhab.binding.weather-1.14.0-SNAPSHOT.jar first!
Copy above org.openhab.binding.weather-1.12.0.jar into /usr/share/openhab2/addons
or
copy above org.openhab.binding.weather-1.14.0-SNAPSHOT.jar into /usr/share/openhab2/addons
I ended up tearing down the house and rebuilding (openhab and weather), I dug deep to find any errors, and couldn’t find anything, apparently there was a problem somewhere, just wish I could figure out what it was, anyway, after rebuilding, it works… using the official binding in Paper UI…possible I done something wrong in the initial build of Openhab, alas I may never know…thanks again for your help++
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Would you be able to share this widget, please?
It’s actually based off this guide. Weather widget example
I had to make some minor CSS changes, and put my images in a different place…
just use that guide, download your images and put them in them in the html folder (your path will look like
html/images/underground/(your pngs go here)
then I just added some css to alter things a bit to fit my scenario.
<style>
table { table-layout: fixed; }
#weather-forecast-table {width:100%;}
#weather-forecast-table td { width: 20%; }
#weather-forecast-table .col-xs-4 {font-size:19px;}
#weather-temp {font-size:40px;}
#weather-temp-sign {font-size:20px;}
#day {font-size:20px;}
#weather-temp {padding:10px;}
</style>
still messing with it a bit. css is far from where I want it, but it’s a start.
oh I also had to change some of the downloaded PNGs naming to match the code.