I’ve been playing with weather.gov and it seems to be having problems. My config:

		{
			module: "weather",
			position: "top_right",
			type: "current",
			weatherProvider: "weather.gov", //
			windUnits: "imperial",
			tempUnits: "imperial",
			useBeaufort: false,
			fade: false,
			config: {
				// See 'Configuration options' for more information.
				apiBase: "https://api.weather.gov/points/",
				weatherEndpoint: "/forecast/hourly", // for current
				lat:        40.25571,
				lon:        -74.39416,
			}
		}, /* * /
		{
			module: "weather",
			position: "top_right",
			type: "daily",
			weatherProvider: "weather.gov", //Default value: openweathermap
			windUnits: "imperial",
			tempUnits: "imperial",
			useBeaufort: false,
			fade: false,
			config: {
				// See 'Configuration options' for more information.
				apiBase: "https://api.weather.gov/points/",
				weatherEndpoint: "/forecast", // for forecast
				lat:        40.25571,
				lon:        -74.39416,
			}
		}, /* */

and from the browser:

api.weather.gov/points/2.5/forecast/hourly?lat=40.25571&lon=-74.39416&units=imperial&lang=en&APPID=:1 Failed to load resource: the server responded with a status of 404 ()
openweathermap.js:45 Could not load data ...  XMLHttpRequest
(anonymous) @ openweathermap.js:45

That URL is all sorts of wonky. The points URL returns the points to get the needed properties:
Mine: https://api.weather.gov/points/40.25571,-74.39416 (under properties “gridId”: “PHI”,“gridX”: 73,“gridY”: 92, )
then builds:
Mine: https://api.weather.gov/gridpoints/PHI/73,92/forecast

@jack819 from the MagicMirror² v2.15.0 is available don’t work. thread

… valid-url was removed from the mm package. do

npm install valid-url

in the mm folder