To upload data, send a GET request to https://weatherstation.wunderground.com/weatherstation/updateweatherstation.php

A full example URL: https://weatherstation.wunderground.com/weatherstation/updateweatherstation.php?ID=KCASANFR5&PASSWORD=XXXXXX&dateutc=2000-01-01+10%3A32%3A35&winddir=230&windspeedmph=12&windgustmph=12&tempf=70&rainin=0&baromin=29.1&dewptf=68.2&humidity=90&weather=&clouds=&softwaretype=vws%20versionxx&action=updateraw

The minimum required query parameters are:

• ID: the station id
• PASSWORD: the station key
• dateutc: the time in format YYYY-MM-DD HH:MM:SS, or "now"

Documentation for available parameters is at https://support.weather.com/s/article/PWS-Upload-Protocol