Node Red scriptlet for requesting weather information from OpenWeatherMap API.

weather-api.nodered

[{"id":"78ee8651.692618","type":"inject","z":"469bc24d.c9b79c","name":"Request Weather Data","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"x":169.5,"y":94,"wires":[["f0f273bd.ed46e"]]},{"id":"f0f273bd.ed46e","type":"http request","z":"469bc24d.c9b79c","name":"OpenWeather API","method":"GET","ret":"txt","url":"http://api.openweathermap.org/data/2.5/weather?q=Cologne,DE&units=metric&APPID=000_YOUR_API_KEY_GOES_HERE_000","tls":"","x":261.5,"y":213,"wires":[["294c54f6.e5b17c","9ec7b5a5.4504b8"]]},{"id":"294c54f6.e5b17c","type":"function","z":"469bc24d.c9b79c","name":"Output Filter: Temperature in Celsius","func":"// Parse OpenWeatherMap JSON answer\nvar weather=JSON.parse(msg.payload);\n \n// Create string with embedded data\nvar newMsg = { payload: \"Current temperature in Cologne is \"+weather.main.temp + \"° Celcius.\" };\n \n// Return formatted message string\nreturn newMsg;\n","outputs":1,"noerr":0,"x":480.5,"y":297,"wires":[["650f3bae.4ea624"]]},{"id":"650f3bae.4ea624","type":"debug","z":"469bc24d.c9b79c","name":"","active":true,"console":"false","complete":"false","x":678.5,"y":406,"wires":[]},{"id":"e0946cc6.c1a7f","type":"comment","z":"469bc24d.c9b79c","name":"Enter your API key here.","info":"You need to apply for a (free) OpenWeather \nAPI key and enter it here. Visit: \nhttp://openweathermap.org/appid\n","x":282.5,"y":175,"wires":[]},{"id":"9ec7b5a5.4504b8","type":"function","z":"469bc24d.c9b79c","name":"Output Filter: Sunset Time","func":"// Parse OpenWeatherMap JSON answer\nvar weather=JSON.parse(msg.payload);\n\n// Create new JavaScript Date object from timestamp\n// multiply by 1000 so argument is milliseconds, not seconds.\nvar date = new Date(weather.sys.sunset * 1000);\nvar timeZoneOffset = -1 * date.getTimezoneOffset()/60;\nvar hours = date.getHours();\n// add leading 0 to handle single digits\nvar minutes = \"0\" + date.getMinutes();\nvar seconds = \"0\" + date.getSeconds();\n\n// Format time like this: 12:45:23 \n// Use last 2 digits, so leading zero gets cut off for double digit numbers.\nvar formattedTime = hours + ':' + minutes.substr(-2) + ':' + seconds.substr(-2);\nvar formattedLocalTime = (hours + timeZoneOffset) + ':' + minutes.substr(-2) + ':' + seconds.substr(-2);\n\n// Create string with embedded data\nvar newMsg = { payload: \"Sunset at: \"+ formattedTime + \" (UTC). (Which seems to be \"+ formattedLocalTime +\" local time for you.)\" };\n \n// Return formatted message string\nreturn newMsg;","outputs":1,"noerr":0,"x":443.5,"y":342,"wires":[["650f3bae.4ea624"]]}]

Great post mate.
and this is how to get the icon info, as it took me a while to figure that out:
var newMsg = {payload:weather.weather[0].icon};

Great post. Finally figured out payload read.
Thx

I'm trying to reduce the container so it can sit with other object. When I do the compass becomes distorted.
Reducing the container skews the pointer, 'N' and arrow.
Can you help?