You do have a couple of scripts to update check-fetch-times.php?show=versions will display that.
Regarding the missing values on the dashboard, that's normal for WeatherLink -- there are no trend values for temp, 24 hr difference, barometer and humidity from WeatherLink so none display.
The Yesterday high/low temperature relies on having the NOAA report available (it looks there for yesterday's data) -- the column with those values is omitted if the NOAA report is not on your site.
The current weather image for WeatherLink is based on the associated METAR in Settings-weather.php -- if none is specified (or the specified one is not 'current'), the icon is omitted along with the text description.
Hope this helps...
Best regards,
Ken